Product Information
Registration Status: ActiveENAP TABLET 10mg is approved to be sold in Singapore with effective from 2000-08-15. It is marketed by SINGAPORE PHARMACEUTICAL PTE LTD, with the registration number of SIN11371P.
This product contains Enalapril 10mg in the form of TABLET. It is approved for ORAL use.
This product is manufactured by KRKA DD NOVO MESTO in SLOVENIA.
It is a Prescription Only Medicine that can only be obtained from a doctor or a dentist, or a pharmacist with a prescription from a Singapore-registered doctor or dentist.
Description
Enalapril is a prodrug that belongs to the angiotensin-converting enzyme (ACE) inhibitor class of medications. It is rapidly metabolized in the liver to enalaprilat following oral administration. Enalaprilat is a potent, competitive inhibitor of ACE, the enzyme responsible for the conversion of angiotensin I (ATI) to angiotensin II (ATII). ATII regulates blood pressure and is a key component of the renin-angiotensin-aldosterone system (RAAS). Enalapril may be used to treat essential or renovascular hypertension and symptomatic congestive heart failure.
Indication
For the treatment of essential or renovascular hypertension and symptomatic congestive heart failure. It may be used alone or in combination with thiazide diuretics.
Mechanism of Action
There are two isoforms of ACE: the somatic isoform, which exists as a glycoprotein comprised of a single polypeptide chain of 1277; and the testicular isoform, which has a lower molecular mass and is thought to play a role in sperm maturation and binding of sperm to the oviduct epithelium. Somatic ACE has two functionally active domains, N and C, which arise from tandem gene duplication. Although the two domains have high sequence similarity, they play distinct physiological roles. The C-domain is predominantly involved in blood pressure regulation while the N-domain plays a role in hematopoietic stem cell differentiation and proliferation. ACE inhibitors bind to and inhibit the activity of both domains, but have much greater affinity for and inhibitory activity against the C-domain. Enalaprilat, the principle active metabolite of enalapril, competes with ATI for binding to ACE and inhibits and enzymatic proteolysis of ATI to ATII. Decreasing ATII levels in the body decreases blood pressure by inhibiting the pressor effects of ATII as described in the Pharmacology section above. Enalapril also causes an increase in plasma renin activity likely due to a loss of feedback inhibition mediated by ATII on the release of renin and/or stimulation of reflex mechanisms via baroreceptors. Enalaprilat's affinity for ACE is approximately 200,000 times greater than that of ATI and 300-1000 times greater than that enalapril.
Pharmacokinetics
- Absorption
- 55-75%, absorption is unaffected by food; enalaprilat (clinically administered IV) is poorly absorbed, 3-12%, due to its high polarity.
- Distribution
- Metabolism
- ~ 60% of absorbed dose is extensively hydrolyzed to enalaprilat, primarily by liver esterases
- Elimination
Toxicity
Overdosage may result in marked hypotension and stupor. Most common adverse effects include hypotension, headache, dizziness and fatigue.
Active Ingredient/Synonyms
(S)-1-(N-(1-(Ethoxycarbonyl)-3-phenylpropyl)-L-alanyl)-L-proline | (S)-1-{(S)-2-[1-((S)-ethoxycarbonyl)-3-phenyl-propylamino]-propionyl}-pyrrolidine-2-carboxylic acid | 1-(N-((S)-1-Carboxy-3-phenylpropyl)-L-alanyl)-L-proline 1'-ethyl ester | Analapril | Enalapril | Enalaprila | Enalaprilum | Enalapril |
Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.