Prazosin

Prazosin, sold under the brand name Minipress among others, is a medication used to treat high blood pressure, symptoms of an enlarged prostate, and nightmares related to post-traumatic stress disorder (PTSD). It is an α1 blocker. It is a less preferred treatment of high blood pressure. Other uses may include heart failure and Raynaud syndrome. It is taken by mouth.

Prazosin
Clinical data
Trade namesMinipress, others
AHFS/Drugs.comMonograph
MedlinePlusa682245
License data
Pregnancy
category
  • AU: B2
Routes of
administration		By mouth
Drug classα1 blocker
ATC code
Legal status
Legal status
  • UK: POM (Prescription only)</ref>
  • US: ℞-only
  • In general: ℞ (Prescription only)
Pharmacokinetic data
Bioavailability~60%
Protein binding97%
Onset of action30–90 minutes
Elimination half-life2–3 hours
Duration of action10–24 hours
Identifiers
  • [4-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-1-piperazinyl](2-furyl)methanone
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.038.971
Chemical and physical data
FormulaC19H21N5O4
Molar mass383.408 g·mol−1
3D model (JSmol)
  • O=C(N3CCN(c2nc1cc(OC)c(OC)cc1c(n2)N)CC3)c4occc4
  • InChI=1S/C19H21N5O4/c1-26-15-10-12-13(11-16(15)27-2)21-19(22-17(12)20)24-7-5-23(6-8-24)18(25)14-4-3-9-28-14/h3-4,9-11H,5-8H2,1-2H3,(H2,20,21,22) Y
  • Key:IENZQIKPVFGBNW-UHFFFAOYSA-N Y
  (verify)

Common side effects include dizziness, sleepiness, nausea, and heart palpitations. Serious side effects may include low blood pressure with standing and depression. Prazosin is a non-selective inverse agonist of the α1-adrenergic receptors. It works to decrease blood pressure by dilating blood vessels and helps with an enlarged prostate by relaxing the outflow of the bladder. How it works in PTSD is not entirely clear.

Prazosin was patented in 1965 and came into medical use in 1974. It is available as a generic medication. In 2020, it was the 190th most commonly prescribed medication in the United States, with more than 2 million prescriptions.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.