Enaplus HCT 10/12.5

Enalapril maleate

Angiotensin-converting enzyme (ACE) is a peptidyl dipeptidase which catalyses the conversion of angiotensin I to the pressor substance angiotensin II.

Mechanism of action: While the mechanism through which enalapril lowers blood pressure is believed to be primarily suppression of the renin-angiotensin-aldosterone system, which plays a major role in the regulation of blood pressure, enalapril is antihypertensive even in patients with low-renin hypertension.

Enalapril maleate – Hydrochlorothiazide

Hydrochlorothiazide is a diuretic and antihypertensive agent which increases plasma renin activity. Although enalapril alone is antihypertensive even in patients with low-renin hypertension, concomitant administration of hydrochlorothiazide in these patients leads to greater reduction of blood pressure.

Pack size Box of 30 tablets, 60 tablets
Shelf-life 24 months
Composition Enalapril maleate 10 mg
Hydrochlorothiazide 12.5 mg
Dosage forms and strengths Tablet 10/12.5
Product code :



Indicated for the treatment of mild to moderate hypertension in patients who have been stabilised on the individual components given in the same proportions.


  • The usual dosage range of enalapril is 10 to 40 mg per day administered in a single or two divided doses; hydrochlorothiazide is effective in doses of 12.5 to 50 mg daily.
  • Therapy with any combination of enalapril and hydrochlorothiazide will be associated with both sets of dose-independent side effects but the addition of enalapril in clinical trials blunted the hypokalemia normally seen with diuretics. To minimize dose-independent side effects, it is usually appropriate to begin combination therapy only after a patient has failed to achieve the desired effect with monotherapy.
  • Dose titration guided by clinical effect
    Further increases of enalapril, hydrochlorothiazide or both depend on clinical response. The hydrochlorothiazide dose should generally not be increased until 2 to 3 weeks have elapsed. In general, patients do not require doses in excess of 20 mg of enalapril or 50 mg of hydrochlorothiazide.
  • Replacement therapy
    The combination may be substituted for the titrated components.
  • Use in renal impairment
    The usual regimens of therapy with enalapril maleate and hydrochlorothiazide need not be adjusted as long as the patient’s creatinine clearance is greater than 30 mL/min/1.73 m2 (serum creatinine approximately less than or equal to 3 mg/dL or 265 μmol/L). In patients with more severe renal impairment, loop diuretics are preferred to thiazides, so enalapril maleate and hydrochlorothiazide is not recommended.

Enaplus HCT 10/12.5 is administered orally.

  • Hypersensitivity to the active substance(s) or to any of the ingredients.
  • Severe renal.
  • Anuria.
  • History of angioneurotic oedema associated with previous ACE inhibitor therapy.
  • Hereditary or idiopathic angioedema.
  • Hypersensitivity to sulfonamide-derived drugs.
  • Second and third trimesters of pregnancy.
  • Severe hepatic impairment.
  • Stenosis of the renal arteries.
  • Aliskiren-containing products is contraindicated in patients with diabetes mellitus or renal impairment.

Very common

  • Blurred vision;
  • Dizziness;
  • Cough;
  • Nausea;
  • Asthenia.


  • Hypokalaemia, increase of cholesterol, increase of triglycerides, hyperuricaemia;
  • Headache, depression, syncope, taste alteration;
  • Hypotension, orthostatic hypotension, rhythm disturbances, angina pectoris, tachycardia;
  • Dyspnea;
  • Diarrhoea, abdominal pain;
  • Rash (exanthema) hypersensitivity/angioneurotic oedema (angioneurotic oedema of the face, extremities, lips, tongue, glottis and/or larynx has been reported); muscle cramps;
  • Chest pain, fatigue;
  • Hyperkalaemia, increases in serum creatinine.

Enalapril maleate – Hydrochlorothiazide

Hypotension and electrolyte fluid imbalance

  • In hypertensive patients receiving Enaplus HCT 10/12.5, symptomatic hypotension is more likely to occur if the patient has been volume-depleted.
  • In some patients with heart failure who have normal or low blood pressure, additional lowering of systemic blood pressure may occur with Enaplus HCT 10/12.5.

Renal function impairment

Renal failure has been reported in association with enalapril and has been mainly in patients with severe heart failure or underlying renal disease.

Dual blockade of the renin-angiotensin-aldosterone system (RAAS)

There is evidence that the concomitant use of ACE inhibitors, angiotensin II receptor blockers or aliskiren increases the risk of hypotension, hyperkalaemia, and decreased renal function.


The combination of enalapril and a low-dose diuretic cannot exclude the possibility of a hyperkalaemia to occur.


The combination of lithium with enalapril and diuretic agents is generally not recommended.


Patients with rare hereditary problems of galactose intolerance, total lactase deficiency or glucose-galactose malabsorption should not take this medicine.

Enalapril maleate

Aortic stenosis/Hypertrophic cardiomyopathy

ACE inhibitors should be given with caution in patients with left ventricular valvular and outflow tract obstruction and avoided in cases of cardiogenic shock and haemodynamically significant obstruction.

Renal function impairment

Renal failure has been reported in association with enalapril and has been mainly in patients with severe heart failure or underlying renal disease.

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.

Haemodialysis patients

The use of enalapril is not indicated in patients requiring dialysis for renal failure.

Kidney transplantation

Enalapril in patients with a recent kidney transplantation.

Hepatic failure

Rarely, ACE inhibitors have been associated with a syndrome that starts with cholestatic jaundice or hepatitis and progresses to fulminant hepatic necrosis and (sometimes) death.


Neutropenia/agranulocytosis, thrombocytopenia and anaemia have been reported in patients receiving ACE inhibitors.


Elevations in serum potassium have been observed in some patients treated with ACE inhibitors, including enalapril.


Diabetic patients treated with oral antidiabetic agents or insulin starting an ACE inhibitor should be told to closely monitor for hypoglycaemia, especially during the first month of combined use.

Hypersensitivity/Angioneurotic oedema

  • Angioneurotic oedema of the face, extremities, lips, tongue, glottis and/or larynx has been reported in patients treated with angiotensin converting enzyme inhibitors, including enalapril maleate.
  • Patients with a history of angioedema unrelated to ACE inhibitor therapy may be at increased risk of angioedema while receiving an ACE inhibitor.
  • Patients receiving coadministration of ACE inhibitor and mTOR inhibitor therapy may be at increased risk for angioedema.

Anaphylactoid reactions during hymenoptera desensitisation

Rarely, patients receiving ACE inhibitors during desensitisation with hymenoptera venom have experienced life-threatening anaphylactoid reactions.

Anaphylactoid reactions during LDL-apheresis

Rarely, patients receiving ACE inhibitors during low density lipoprotein (LDL)-apheresis with dextran sulfate have experienced life-threatening anaphylactic reactions.


Cough has been reported with the use of ACE inhibitors. Characteristically, the cough is non-productive, persistent and resolves after discontinuation of therapy.


Enalapril blocks angiotensin II formation and therefore impairs the ability of patients undergoing major surgery or anaesthesia with agents that produce hypotension to compensate via the renin-angiotensin system.


ACE inhibitors should not be initiated during pregnancy.

Ethnic differences

As with other angiotensin converting enzyme inhibitors, enalapril is apparently 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.


Renal function impairment

Thiazides may not be appropriate diuretics for use in patients with renal impairment and are ineffective at creatinine clearance values of 30 ml/min or below (i.e., moderate or severe renal insufficiency).

Hepatic disease

Thiazides should be used with caution in patients with impaired hepatic function or progressive liver disease, since minor alterations of fluid and electrolyte balance may precipitate hepatic coma.

Metabolic and endocrine effects

  • Thiazide therapy may impair glucose tolerance. Dosage adjustment of antidiabetic agents, including insulin, may be required. Thiazides may decrease serum sodium, magnesium and potassium levels.
  • Increases in cholesterol and triglyceride levels may be associated with thiazide diuretic therapy.
  • Thiazides may decrease urinary calcium excretion and cause an intermittent and slight elevation of serum calcium in the absence of known disorders of calcium metabolism.
  • Thiazide therapy may precipitate hyperuricaemia and/or gout in certain patients. This effect on hyperuricaemia appears to be dose-related. In addition enalapril may increase urinary uric acid and thus may attenuate the hyperuricaemic effect of hydrochlorothiazide.
  • As for any patient receiving diuretic therapy, periodic determination of serum electrolytes should be performed at appropriate intervals.
  • Thiazides (including hydrochlorothiazide) can cause fluid or electrolyte imbalance (hypokalaemia, hyponatraemia, and hypochloraemic alkalosis).
  • Although hypokalaemia may develop during use of thiazide diuretics, concurrent therapy with enalapril may reduce diuretic-induced hypokalaemia.
  • Hyponatraemia may occur in oedematous patients in hot weather.
  • Thiazides may have been shown to increase the urinary excretion of magnesium, which may result in hypomagnesaemia.

Anti-doping test

Hydrochlorothiazide contained in this product can produce a positive analytic result in an anti-doping test.


In patients receiving thiazides, sensitivity reactions may occur with or without a history of allergy and bronchial asthma. Exacerbation or activation of systemic lupus erythematosus has been reported with the use of thiazides.

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.