Summary of product characteristics

Tanatril 5, 10, 20 mg Tablets
Imidapril hydrochloride

Tanatril 5 mg tablet.
Tanatril 10 mg tablets
Tanatril 20 mg tablets
Imidapril hydrochloride 5 mg
Imidapril hydrochloride 10 mg
Imidapril hydrochloride 20 mg
For excipients, see 6 .1
Off-white oblong biconvex tablets with a plane edge, scored on both sides.
Each tablet can be divided into equal parts.
Therapeutic Indications
Treatment of essential hypertension
Posology and Method of Administration
- AdultsTreatment should be initiated with 5 mg once a day. If optimum control of blood pressure has not been achieved after at least 3 weeks of treatment, the daily dose should be increased to 10 mg, which has been determined to be the most effective daily dose. However, in a small number of patients it might be necessary to increase the daily dose to 20 mg (recommended maximum dose) or preferably, to consider combination therapy with a diuretic. It has not been assessed whether hypertensive patients would benefit from a combination of imidapril with other antihypertensive therapies. It is recommended that the tablets be taken at about the same time of day about 15 minutes before meals, conditions under which efficacy has been demonstrated. - Elderly (65 years or older) The initial dose is 2.5 mg once a day. The dose should be titrated according to blood pressure response. The recommended maximum dose is 10 mg once a day. - Impaired renal function Imidapril and its pharmacologically active metabolite, imidaprilat, are predominantly excreted via the kidney. Renal function should be evaluated before commencing therapy with imidapril in patients suspected of renal impairment. Creatinine clearance may be determined prior to treatment by using the formula of COCKROFT & GAULT (Nephron 1976; 16: 31-41): Cl Crea = (140-age [years]) x body weight [kg] (for women the resulting value will be multiplied with 0.85; if the unit μmol/l is used instead of mg/dl, 72 will be replaced by 0.813) - Creatinine clearance between 30 ml/min and 80 ml/min (see section 4.4): Reduced doses are required for these patients and therefore it is recommended that treatment be initiated with 2.5 mg. - Creatinine clearance between 10 ml/min and 29 ml/min (see section 4.4): Because of limited experience which has shown an increase in the AUC of imidaprilat (see section 5.2), imidapril should not be administered to these patients - Creatinine clearance below 10 ml/min (renal failure with or without hemodialysis) The drug is contra-indicated in these patients (see section 4.3). - Hepatic impairmentThe recommended starting dose in patients with hepatic impairment is 2 .5 mg once a day. Imidapril should be used with caution in patients with hepatic impairment. - Patients at increased risk for first dose hypotensionFirst dose hypotension may occur in high risk patients (see section 4.4). Initiation of therapy requires, if possible, correction in salt and/or body fluids deficiencies, and discontinuation of an existing diuretic therapy for two to three days before ACE inhibition. If this is not possible, initial dose should be imidapril 2.5 mg. In hypertensive patients with concomitant cardiac failure symptomatic hypotension has been observed after treatment with ACE inhibitors. In these patients the initial dose should be 2.5 mg imidapril once a day under close medical supervision. Patients at high risk for severe acute first dose hypotension should be monitored medically, preferably in hospital, for up to 6-8 hours after administration of the first dose of imidapril and whenever the dose of imidapril or a concomitant diuretic is increased. The initial dose should be 2.5 mg. This also applies to patients with angina pectoris and cerebrovascular disease. These patients are at increased risk to experience myocardial infarction or cerebrovascular accident following excessive hypotension. - Children There is no experience in children (see section 4.4). Contraindications
- Hypersensitivity to imidapril or any other ACE inhibitor or to any of the excipients - History of angioneurotic oedema associated with previous ACE inhibitor therapy - Second and third trimesters of pregnancy (see sections 4.4 and 4.6) - Renal failure with or without haemodialysis (creatinine clearance < 10 ml/min). Special Warnings and Special Precautions for Use
Imidapril like other ACE inhibitors may cause a profound fall in blood pressure especially after the first dose. Symptomatic hypotension is rare in uncomplicated hypertensive patients. It is more likely to occur in patients who have been volume depleted by diuretic therapy, dietary salt restriction, dialysis, diarrhoea or vomiting. It has been reported mainly in patients with severe cardiac failure with or without associated renal insufficiency. This is more likely in patients on high doses of loop diuretics, or those with hyponatraemia or functional renal impairment. In these patients treatment should be started under very close medical supervision, preferably in a hospital, with imidapril 2.5 mg and careful dose titration. If possible, diuretic treatment should be discontinued temporarily. Such considerations apply also to patients with ischaemic heart- or cerebrovascular disease in whom excessive hypotension could result in a myocardial infarction or cerebrovascular accident. If hypotension develops, the patient should be placed in a supine position. Volume repletion with intravenous normal saline may be required. The appearance of hypotension after the initial dose does not preclude subsequent careful dose titration with imidapril after effective management. - Aortic or mitral valve stenosis/Hypertrophic cardiomyopathy As with others ACE inhibitors, imidapril should be used with caution in patients with an obstruction in the outflow tract of the left ventricle. Neutropenia/agranulocytosis, thrombocytopenia and anaemia have been reported rarely in patients receiving ACE inhibitors, including imidapril. In patients with normal renal function and no other complicating factors, neutropenia occurs rarely. Imidapril should be used with extreme caution in patients with collagen vascular disease, immunosuppressant therapy, treatment with allopurinol or procainamide, or a combination of these complicating factors, especially if there is pre-existing impaired renal function. Some of these patients developed serious infections which in a few instances did not respond to intensive antibiotic therapy. If imidapril is used in such patients, it is advised that white blood cell count and differential counts should be performed prior to therapy, every 2 weeks during the first 3 months of imidapril therapy, and periodically thereafter. During treatment all patients should be instructed to report any sign of infection (e.g. sore throat, fever) when a differential white blood cell count should be performed. Imidapril and other concomitant medication should be withdrawn if neutropenia (neutrophils less than 1000/mm3) is detected or suspected. In most patients neutrophil counts rapidly return to normal upon discontinuing imidapril. Changes in renal function may be anticipated in susceptible individuals due to the inhibition of the renin-angiotensin-aldosterone system. Therefore imidapril like other ACE inhibitors should be used with caution in patients with renal insufficiency. Reduced doses are required for patients with creatinine clearance between 30ml/min to 80ml/min (see section 4.2). Imidapril should not be administered in patients with creatinine clearance less than 30 ml/min because of limited experience in these patients (see section 4.2 and section 5.2). Close monitoring of renal function during therapy should be performed as deemed appropriate. Renal failure has been reported in association with ACE inhibitors, mainly in patients with severe cardiac failure or underlying renal disease, including renal artery stenosis. Some patients, with no apparent pre-existing renal disease, may develop increases in blood urea and creatinine concentrations when a diuretic is given concomitantly. Dosage reduction of the ACE inhibitor and/or discontinuation of the diuretic may be required. It is recommended that the renal function be monitored during the first weeks of therapy. - Patients with renovascular hypertension There is an increased risk of hypotension and renal insufficiency when patients with bilateral renal artery stenosis or stenosis of the artery to a single functioning kidney are treated with ACE inhibitors. Loss of renal function may occur with only mild changes in serum creatinine. In these patients, therapy should be initiated under close medical supervision with low doses, careful titration, and monitoring of renal function. Anaphylactoid reactions have been reported in patients dialysed with high-flux membranes (e.g., AN 69®) and treated concomitantly with an ACE inhibitor. In these patients consideration should be given to using a different type of dialysis membrane or a different class of antihypertensive agent. - Kidney transplantation There is no experience regarding the administration of imidapril in patients with a recent kidney transplantation Angioneurotic oedema of the face, extremities, lips, tongue, glottis and/or larynx has been reported in patients treated with angiotensin converting enzyme inhibitors, including imidapril. This may occur at any time during treatment. In such cases, imidapril should be discontinued promptly and appropriate monitoring should be instituted to ensure complete resolution of symptoms prior to dismissing the patient. In those instances where swelling has been confined to the face and lips the condition generally resolved without treatment, although antihistamines have been useful in relieving symptoms. Angioneurotic oedema associated with laryngeal oedema may be fatal. Where there is involvement of the tongue, glottis or larynx, likely to cause airway obstruction, appropriate therapy, which may include subcutaneous epinephrine solution 1:1000 (0.3 ml to 0.5 ml) and/or measures to ensure a patent airway, should be administered promptly. Black patients receiving ACE inhibitors have been reported to have a higher incidence of angioedema compared to non-blacks. Patients with a history of angioedema unrelated to ACE inhibitor therapy may be at increased risk of angioedema while receiving an ACE inhibitor (see section 4.3). Intestinal angioedema has been reported rarely in patients treated with ACE inhibitors (see section 4.8). - Patients on LDL lipid apheresis Patients treated with an ACE inhibitor undergoing LDL lipid apheresis with dextrane sulphate may experience anaphylactoid reactions similar to those seen in patients under-going haemodialysis with high-flux membranes (see above). It is recommended that an agent from another class of antihypertensive drugs is used in these patients. - Anaphylactoid reactions during desensitisation: Sustained life-threatening anaphylactoid reactions have been rarely reported for patients undergoing desensitising treatment with hymenoptera venom while receiving another ACE inhibitor. In the same patients, these reactions were avoided when the ACE inhibitor was temporarily withheld, but they reappeared upon inadvertent rechallenge. Therefore, caution should be used in patients treated with ACE inhibitors undergoing such desensitisation procedures. - Patients with hepatic insufficiencyRarely, ACE inhibitors have been associated with a syndrome that starts with cholestatic jaundice or hepatitis and progresses to fulminant hepatic necrosis and (sometimes) death. The mechanism of this syndrome is not understood. Patients receiving ACE inhibitors who develop jaundice or marked elevations of hepatic enzymes should discontinue the ACE inhibitor and receive appropriate medical follow-up. - Cough During treatment with imidapril a dry and non-productive cough may occur which disappears after discontinuation. No data are available on the use of imidapril under conditions of surgery or anaesthesia. However, imidapril, like other ACE inhibitors, may cause hypotension or even hypotensive shock in patients undergoing major surgery or during anaesthesia through the enhancement of other hypotensive potentials. If it is not possible to withhold imidapril volume management should be handled with care. Elevations in serum potassium have been observed in some patients treated with ACE inhibitors, including imidapril. Patients at risk for the development of hyperkalaemia include those with renal insufficiency, uncontrolled diabetes mellitus, or those using concomitant potassium-sparing diuretics, potassium supplements or potassium-containing salt substitutes; or those patients taking other drugs associated with increases in serum potassium (e.g. heparin). If concomitant use of imidapril and any of the above mentioned agents is deemed appropriate, regular monitoring of serum potassium is recommended (see section 4.5). Proteinuria was rarely seen with imidapril. It may occur particularly in patients with existing renal function impairment but was also seen on relatively high doses of other ACE inhibitors. The glycaemia levels should be closely monitored in diabetic patients previously treated with oral antidiabetic drugs or insulin, namely during the first month of treatment with an ACE inhibitor. Some elderly, especially very old patients, may be more responsive to imidapril than younger patients. For elderly patients aged 65 years or older, the initial daily dose should be imidapril 2.5 mg. Evaluation of the renal function at the beginning of the treatment is recommended. Imidapril should not be administered to children until safety and efficacy have been established. ACE-inhibitors are less effective in lowering blood pressure in black people than in non-blacks, possibly because of a higher prevalence of low-renin states in the black hypertensive population. Tanatril contains lactose. Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicine. Tanatril is generally not recommended in combination with potassium-sparing diuretics, potassium salts and lithium (see section 4.5). ACE inhibitors should not be initiated during pregnancy. Unless continued ACE inhibitor therapy is considered essential, patients planning pregnancy should be changed to alternative antihypertensive treatments which have an established safety profile for use in pregnancy. When pregnancy is diagnosed, treatment with ACE inhibitors should be stopped immediately, and, if appropriate, alternative therapy should be started (see sections 4.3 and 4.6). Interaction with other Medicinal Products and other Forms of Interaction
Potassium sparing diuretics alone or in combination or potassium supplements: Imidapril, like other ACE inhibitors, attenuates diuretic induced potassium loss. Potassium sparing diuretics, e.g. spironolactone, triamterene or amiloride, potassium supplements, or potassium-containing salt substitutes may lead to significant increases in serum potassium (potentially lethal), especially in conjunction with renal impairment (additive hyperkalemic effects). ACE inhibitors must not be associated with hyperkalemic substances, except in hypokalemia. If concomitant use is indicated because of demonstrated hypokalemia they should be used with caution and with frequent monitoring of serum potassium. Non-potassium-sparing diuretics: Risk of sudden hypotension and/or acute renal impairment on initiation of treatment with an ACE inhibitor in patients with pre-existing salt/volume depletion. In arterial hypertension, when prior diuretic therapy can have caused salt/volume depletion, either the diuretic must be discontinued before initiating the ACE inhibitor, in which case a non-potassium-sparing diuretic can be thereafter reintroduced, or the ACE inhibitor must be initiated with a low dosage and progressively increase. The renal function (creatinine levels) should be monitored during the first few weeks of ACE inhibitor therapy. Lithium Increased lithium concentration, potentially to toxic levels (decreased renal lithium excretion). Use of imidapril with lithium is not recommended, but if the combination proves necessary, careful monitoring of serum lithium levels should be performed (see section 4.4). Non-steroidal anti-inflammatory drugs (NSAIDs): When ACE-inhibitors are administered simultaneously with non-steroidal anti-inflammatory drugs (ie acetylsalicylic acid at anti-inflammatory dosage regimens, COX-2 inhibitors and non-selective NSAIDs), attenuation of the antihypertensive effect may occur. Concomitant use of ACE-inhibitors and NSAIDs may lead to an increased risk of
worsening of renal function, including possible acute renal failure, and an increase in
serum potassium, especially in patients with poor pre-existing renal function. The
combination should be administered with caution, especially in the elderly. Patients
should be adequately hydrated and consideration should be given to monitoring renal
function after initiation of concomitant therapy, and periodically thereafter.
Nitritoid reactions (symptoms include facial flushing, nausea, vomiting and
hypotension) have been reported rarely in patients on therapy with injectable gold
(sodium aurothiomalate) and concomitant ACE inhibitor therapy.
Antihypertensive agents and vasodilators:
Concomitant use of these agents may increase the hypotensive effects of imidapril.
Concomitant use with nitroglycerin and other nitrates, or other vasodilators, may
further reduce blood pressure.
Antidiabetic agents (insulin, hypoglycaemic sulphonamides):
The use of ACE inhibitors may increase the hypoglycaemic effect in diabetic patients
treated with insulin or hypoglycaemia sulphonamides.
Hypoglycaemic episodes appear to be rare (improved glucose tolerance which could
lead to reduced need for insulin).
Self-monitoring of glycaemia should be reinforced Acetylsalicylic acid, thrombolytics, beta-blockers: Imidapril may be used concomitantly with acetylsalicylic acid (when used as a thrombolytic), thrombolytics, and beta-blockers. Tricyclic antidepressants, neuroleptics: Increased antihypertensive effect and risk of orthostatic hypotension (additive effect). Rifampicin: The administration of rifampicin reduced the plasma level of imidaprilat, the active metabolite of imidapril. The antihypertensive effect of imidapril might therefore be reduced. May induce decreased bioavailability of imidapril. May reduce the antihypertensive effects of ACE inhibitors; patients should be carefully monitored to confirm that the desired effect is obtained. Pregnancy and Lactation

The use of ACE inhibitors is not recommended during the first trimester of pregnancy (see section 4.4). The use of ACE inhibitors is contraindicated during the second and third trimester of pregnancy (see sections 4.3 and 4.4).
Epidemiological evidence regarding the risk of teratogenicity following exposure to ACE inhibitors during the first trimester of pregnancy has not been conclusive; however a small increase in risk cannot be excluded. Unless continued ACE inhibitor therapy is considered essential, patients planning pregnancy should be changed to alternative antihypertensive treatments which have an established safety profile for use in pregnancy. When pregnancy is diagnosed, treatment with ACE inhibitors should be stopped immediately, and, if appropriate, alternative therapy should be started. Exposure to ACE inhibitor therapy during the second and third trimesters is known to induce human foetotoxicity (decreased renal function, oligohydramnios, skull ossification retardation) and neonatal toxicity (renal failure, hypotension, hyperkalaemia) (See section 5.3.). Should exposure to ACE inhibitor have occurred from the second trimester of pregnancy, ultrasound check of renal function and skull is recommended. Infants whose mothers have taken ACE inhibitors should be closely observed for hypotension (see sections 4.3 and 4.4). Because no information is available regarding the use of imidapril during breastfeeding, imidapril is not recommended and alternative treatments with better established safety profiles during breast-feeding are preferable, especially while nursing a newborn or preterm infant. Effects on Ability to Drive and Use Machines
When driving vehicles or operating machines it should be taken into account that occasionally dizziness or weariness may occur. No studies on the effects on the ability to drive have been performed. Undesirable Effects
The incidence of adverse events in hypertensive patients on imidapril was 34% with 36% for placebo. Cough, dizziness, fatigue/somnolence, dyspepsia and vomiting occurred more frequently in the imidapril group. The undesirable effects that have been observed and reported during treatment with imidapril in pre-approval studies are presented in the table below with the following frequencies: Very common (≥ 1/10), common (≥1/100 to < 1/10), uncommon (≥1/1,000 to < 1/100), rare (≥1/10,000 to < 1/1,000), very rare (<1/10,000), not known (cannot be estimated from the available data). Investigations
Hyperkalaemia, Creatinine increased, Urea increased, GPT/ALAT increased, Gamma-GT increased Blood amylase increased, GOT/ASAT increased, Decreased albumin, AP
increased, Serum protein decreased, Impaired renal function

Cardiac disorders
Uncommon Palpitations

Blood and lymphatic system disorders
Rare Leucopenia, Anaemia
Nervous system disorders
Common Headache, Dizziness, Fatigue/Somnolence
Uncommon Cerebrovascular
Respiratory, thoracic and mediastinal disorders
Common Cough
Uncommon Rhinitis
Gastrointestinal disorders
Common Nausea
Uncommon Vomiting, Epigastric pain, Dyspepsia
Skin and subcutaneous tissue disorders
Uncommon Rash, Pruritus
Infections and infestations
Uncommon Bronchitis, Viral infection, Upper respiratory tract infection

General disorders and administration conditions
Chest pain, Pain in limbs, Oedema (joint, peripheral) The following adverse reactions have been observed in association with imidapril or with other ACE inhibitors. Please also refer to section 4.4 to avoid these reactions: Decreases in haemoglobin, haematocrit, platelets and white cell count as well as elevation of liver enzymes, serum bilirubin and creatine phosphokinase (CPK) have been reported in a few patients. Elevation of serum potassium may occur since imidapril leads to a decrease in aldosterone secretion. Increases in blood urea and plasma creatinine, reversible on discontinuation, may occur, especially in the presence of renal insufficiency. Cardiac disorders: Severe hypotension may occur after initiation of therapy or increase of dose in certain risk groups. Symptoms like dizziness, feeling of weakness, impaired vision, rarely with disturbance of consciousness (syncope) can occur in association with hypotension. Individual cases of tachycardia, palpitations, arrhythmias, angina pectoris, myocardial infarction, transient ischemic attacks and cerebral haemorrhage have been reported for ACE inhibitors in association with hypotension. Blood and lymphatic system disorders: Neutropenia/agranulocytosis, thrombocytopenia, pancytopenia and anaemia have been reported rarely in patients receiving ACE inhibitors. In patients with a congenital deficiency concerning G-6-PDH individual cases of haemolytic anaemia have been reported under other ACE inhibitors. Nervous system disorders: Dizziness, weariness and fatigue have been reported. Rarely depression, sleep disorders, paresthesias, impotence, disorder of balance, confusion, tinnitus, blurred vision, headache and taste disturbance may occur with ACE inhibitors. Respiratory, thoracic and mediastinal disorders: ACE inhibitors have been documented to induce cough in a substantial number of patients. Rarely dyspnoea, sinusitis, rhinitis, glossitis, bronchitis, bronchiospasm and angioedema involving the upper airways, and very rarely allergic alveolits/eosinophilic pneumonia may occur with ACE inhibitors. Gastrointestinal disorders: Diarrhoea, nausea, vomiting, gastritis, abdominal pain, constipation, dry mouth, cholestatic icterus, hepatitis, pancreatitis and ileus may occur with ACE-inhibitors. Intestinal angioedema has been reported rarely in patients treated with ACE inhibitors. Symptoms are abdominal pain with or without nausea or vomiting. Renal urinary disorders: Renal insufficiency may rarely occur or be intensified. Acute renal failure has been reported for other ACE inhibitors. Skin and subcutaneous disorders: Occasionally allergic and hypersensitivity reactions such as rash, pruritus, exanthema and urticaria can occur. ACE inhibitors have been associated with the onset of angioneurotic oedema involving the face and oropharyngeal tissues. Cases of erythema multiforme, Steven-Johnson syndrome, toxic epidermic necrolysis, psoriasis-like efflorescences and alopecia were reported for ACE inhibitors. Cutaneous symptoms can be accompanied by fever, myalgia, arthralgia, eosinophilia and/or increased ANA titers. Hepatobiliary disorders: Patients receiving ACE inhibitors have developed jaundice or had marked elevations of hepatic enzymes. Overdose
Symptoms of overdosage are severe hypotension, shock, stupor, bradycardia,
electrolyte disturbances and renal failure.
After ingestion of an overdose, the patient should be kept under close supervision,
preferably in an intensive care unit. Serum electrolytes and creatinine should be
monitored frequently. Therapeutic measures depend on the nature and severity of the
symptoms. Measurements to prevent absorption and hasten elimination such as
gastric lavage, administration of adsorbents and sodium sulphate within 30 minutes
after intake should be applied if ingestion is recent
If hypotension occurs, the patient should be placed in the shock position and salt and
volume supplementation should be given rapidly. Treatment with angiotensin II
should be considered. Bradycardia or extensive vagal reactions should be treated by
administering atropine. The use of a pacemaker may be considered. Imidapril and
imidaprilat may be removed from the circulation by hemodialysis. The use of high-
flux polyacrylonitrile membranes should be avoided.
Pharmacodynamic Properties
ATC Code and pharmaco-therapeutic class: C09A, ACE inhibitors. The hypotensive effect of imidapril in hypertension appears to result primarily from the suppression of the plasma renin-angiotensin-aldosterone system. Renin is an endogenous enzyme synthesized by the kidneys and released into the circulation where it converts angiotensinogen to angiotensin I, a relatively inactive decapeptide. Angiotensin I is then converted by angiotensin converting enzyme, a peptidylpeptidase, to angiotensin II. Angiotensin II is a potent vasoconstrictor responsible for arterial vasoconstriction and increased blood pressure, as well as for stimulation of the adrenal gland to secrete aldo-sterone. Inhibition of ACE results in decreased plasma angiotensin II, which leads to decreased vasopresssor activity and to reduce aldosterone secretion. Although the latter decrease is small, small increases in serum potassium concentrations may occur, along with sodium and fluid loss . The cessation of the negative feedback of angiotensin II on the renin secretion results in an increase of the plasma renin activity. Another function of the converting enzyme is to degrade the potent vasodepressive kinin peptide bradykinine to inactive metabolites. Therefore inhibition of ACE results in an increased activity of circulating and local kallikrein-kinin system which may contribute to peripheral vasodilation by activating the prostaglandin system. Possibly this mechanism is involved in the hypotensive effect of ACE inhibitors and is responsible for certain side effects. Administration of imidapril to hypertensive patients results in a reduction of sitting, supine and standing blood pressure to about the same extent with no compensatory in-crease of the heart rate. The peak hypotensive effect was observed 6-8 hours after drug intake. Achievement of optimal blood pressure reduction may require several weeks of therapy in some patients. The antihypertensive effects are maintained during long term treatment. Abrupt withdrawal of therapy has not been associated with a rapid increase in blood pressure. There is an increase in renal blood flow and glomerular filtration rate is usually unchanged. ACE inhibitors are effective even in patients with low-renin hypertension. Although antihypertensive effects have been found in the races studied, black hypertensive patients (usually a low-renin hypertensive population) had a smaller average response to ACE inhibitor monotherapy than non-black patients. This difference disappears when a diuretic is added. Pharmacokinetic Properties
Following oral administration imidapril is rapidly absorbed from the gastrointestinal tract and reaches its maximum plasma concentration within 2 hours. Plasma concentrations decline monophasically with a half-life of about 2 hours. Its absorption is about 70%. A fat-rich meal significantly reduces the absorption of imidapril. Imidapril is mainly hydrolysed to its pharmacologically active metabolite, imidaprilat. Maximum plasma concentrations of imidaprilat are reached within 7 hours. Plasma concentrations of imidaprilat decline biphasically with an initial half-life of about 7-9 hours and a terminal half-life of more than 24 hours. The absolute bioavailability of imidaprilat is about 42%. The protein binding of imidapril and imidaprilat was moderate (85% and 53%, respectively). Oral absorption of imidapril after single oral dosing appeared linear from at least 10 mg up to 240 mg imidapril based on plasma and urinary excretion data. After oral administration of the radiolabelled compound about 40% of total radioactivity is excreted in urine and about 50% in the faeces. After multiple dosing steady state concentrations of imidaprilat are reached after the first administration of imidapril after about 5 days. Increased plasma levels and AUC values of imidapril and imidaprilat were observed in patients with renal impairment. There was a two fold increase in the AUC of imidaprilat in patients with a creatinine clearance 30-80 ml/min and an almost tenfold increase in patients with a creatinine clearance 10-29 ml/min. The experience in all grades of renal impairment is very limited. There is no experience with the 20 mg dose in renal impairment. In patients with hepatic impairment the AUC of imidapril and imidaprilat were slightly higher than in normal subjects while the tmax for both was similar in the two groups. Furthermore the t1/2 of imidaprilat, but not that of imidapril, was significantly increased in the hepatically impaired patients. Pre-clinical Safety Data
There were no specific effects from either short studies (including mutagenity
studies) or long term toxicity studies (including carcinogenicity studies) which
provide any additional relevant data to that available from the use in man.
In animal reproduction studies imidapril did not show clear evidence of foetotoxicity though prenatal growth retardation and reduced body weight gain were seen in rat pups at 1500 mg/kg. Male and female fertility in rats was not impaired. Teratogenicity studies in rats and rabbits did not reveal any teratogenic potential. PHARMACEUTICAL PARTICULARS
List of Excipients
Calcium hydrogen phosphate, anhydrous
Maize starch, pregelatinised
Lactose monohydrate
Croscarmellose sodium
Glycerol distearate
Not applicable.
3 years.
Special Precautions for Storage
Do not store above 30°C.
Nature and Content of Container
Aluminium/aluminium or PVDC/aluminium – Blister with 5, 7 and 10 tablets.
Packs with 7, 10, 14, 15, 20, 28, 30, 50, 56, 100, and 1000 tablets
Not all packaging material or pack sizes may be marketed.
Special precautions for Disposal
No special requirement.
PL20012/0004 (5 mg)
PL20012/0005 (10 mg)
PL20012/0006 (20 mg)


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