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Systematic (IUPAC) name
2-[(3-methyl-4-(2,2,2-trifluoroethoxy) pyridin-2-yl) methylsulfinyl] -1H-benzoimidazole
CAS number 103577-45-3
ATC code A02BC03
PubChem 3883
DrugBank APRD00077
Chemical data
Formula C16H14F3N3O2S 
Mol. mass 369.363 g/mol
Pharmacokinetic data
Bioavailability 80% or more
Protein binding 97%
Metabolism Hepatic (CYP3A4- and CYP2C19-mediated)
Half life 1–1.5 hours
Excretion Renal and fecal
Therapeutic considerations
Licence data


Pregnancy cat.

B3(AU) B(US)

Legal status

Prescription only

Routes Oral, IV

Lansoprazole (lan-SOE-pra-zole, INN) is a proton pump inhibitor which prevents the stomach from producing acid. It is manufactured by TAP Pharmaceutical Products.



Lansoprazole is a proton pump inhibitor (PPI) in the same pharmacologic class as omeprazole. Lansoprazole has been marketed for many years and is one of several PPI's available.[citation needed]

Lansoprazole's plasma elimination half-life is not proportional to the duration of the drug's effects (i.e. gastric acid suppression). The mean plasma elimination half-life is 1.5 hours,[1] and the effects of the drug last for over 24 hours after it has been used for 1 day or more.[citation needed]

Prevacid is now manufactured and distributed by Novartis Consumer Health.


Lansoprazole is indicated for:

  • Treatment of ulcers of the stomach and duodenum, and NSAID-induced ulcers
  • Treatment of gastroesophageal reflux disease (GERD) (also known as acid reflux disease)
  • Treatment of Zollinger-Ellison Syndrome
  • Adjunctive treatment of Helicobacter pylori infection, alongside antibiotics


Side effects

  • Infrequent: dry mouth, insomnia, drowsiness, blurred vision, rash, pruritus
  • Rarely and very rarely: taste disturbance, liver dysfunction, peripheral oedema, hypersensitivity reactions (including bronchospasm, urinary, angioedema, anaphylaxis), photosensitivity, fever, sweating, depression, interstitial nephritis, blood disorders (including leukopenia, leukocytosis, pancytopenia, thrombocytopenia), arthralgia, myalgia, skin reactions (including Stevens-Johnson syndrome, toxic epidermal necrolysis, bullous eruption)
  • Severe: Gastro-intestinal disturbances (such as nausea 1.3%, abdominal pain 2.1%, diarrhea 3.8%[1]

Brand names

  The drug is sold with the following brand names:

  • Aprazol (Turkey)
  • Lansox (Italy)
  • Limpidex (Italy)
  • Prevacid (U.S. and Canada)
  • Takepron (Japan)
  • Zoton (Italy, Australia, UK)
  • Refluxon (Hungary)
  • Duogast (Syria)
  • Lanzap
  • Prosogan
  • Lanton (Israel)
  • Ogast (France)
  • SOLOX (New Zealand)
  • Prosogan FD (Indonesia)

Lansoprazole is also available as a generic drug in Belgium, Colombia, Italy and Mexico.


  1. ^ a b Prevacid Pharmacology, Pharmacokinetics, Studies, Metabolism. (2007). Retrieved on 2007-04-14.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lansoprazole". A list of authors is available in Wikipedia.
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