From WikiProjectMed
Jump to navigation Jump to search
Quinapril structure.svg
Trade namesAccupril, others
Clinical data
  • D
Routes of
By mouth
Defined daily dose15 mg[1]
External links
Legal status
  • In general: ℞ (Prescription only)
Protein binding97%
Elimination half-life2 hours
Chemical and physical data
Molar mass438.524 g·mol−1
3D model (JSmol)
Melting point120 to 130 °C (248 to 266 °F)

Quinapril, sold under the brand name Accupril among others, is a medication used to treat high blood pressure, heart failure, and diabetic kidney disease.[2] It is a reasonable initial treatment for high blood pressure.[2] It is taken by mouth.[2]

Common side effects include headaches, dizziness, feeling tired, and cough.[2] Serious side effects may include liver problems, low blood pressure, angioedema, kidney problems, and high blood potassium.[2] Use in pregnancy and breastfeeding is not recommended.[3] It is an ACE inhibitor and works by decreasing renin-angiotensin-aldosterone system activity.[2]

Quinapril was patented in 1980 and came into medical use in 1989.[4] It is available as a generic medication.[5] A month supply in the United Kingdom costs the NHS about £4 as of 2019.[5] In the United States the wholesale cost of this amount is about US$3.50.[6] In 2017, it was the 269th most commonly prescribed medication in the United States, with more than one million prescriptions.[7][8]

Medical uses

Quinapril is indicated for the treatment of high blood pressure (hypertension) and as adjunctive therapy in the management of heart failure. It may be used for the treatment of hypertension by itself or in combination with thiazide diuretics, and with diuretics and digoxin for heart failure.


The defined daily dose is 15 mg by mouth or by injection.[1]

Side effects

Side effects of quinapril include dizziness, cough, vomiting, upset stomach, angioedema, and fatigue.


  • Pregnancy
  • Impaired kidney and liver function
  • People with a history of angioedema related to previous treatment with an ACE inhibitor
  • Hypersensitivity to quinapril

Mechanism of action

Quinapril inhibits angiotensin converting enzyme, an enzyme which catalyses the formation of angiotensin II from its precursor, angiotensin I. Angiotensin II is a powerful vasoconstrictor and increases blood pressure through a variety of mechanisms. Due to reduced angiotensin production, plasma concentrations of aldosterone are also reduced, resulting in increased excretion of sodium in the urine and increased concentrations of potassium in the blood.


  1. 1.0 1.1 "WHOCC - ATC/DDD Index". www.whocc.no. Retrieved 7 September 2020.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 "Quinapril Hydrochloride Monograph for Professionals". Drugs.com. American Society of Health-System Pharmacists. Retrieved 3 March 2019.
  3. "Quinapril Pregnancy and Breastfeeding Warnings". Drugs.com. Retrieved 3 March 2019.
  4. Fischer, Jnos; Ganellin, C. Robin (2006). Analogue-based Drug Discovery. John Wiley & Sons. p. 468. ISBN 9783527607495.
  5. 5.0 5.1 British national formulary : BNF 76 (76 ed.). Pharmaceutical Press. 2018. p. 172. ISBN 9780857113382.
  6. "NADAC as of 2019-02-27". Centers for Medicare and Medicaid Services. Retrieved 3 March 2019.
  7. "The Top 300 of 2020". ClinCalc. Retrieved 11 April 2020.
  8. "Quinapril - Drug Usage Statistics". ClinCalc. Retrieved 11 April 2020.

External links