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At a glance

Vonoprazan is indicated for: Gastric ulcer, duodenal ulcer, reflux esophagitis, prevention of recurrence of gastric or duodenal ulcer during low-dose aspirin administration, prevention of recurrence of gastric or duodenal ulcer during NSAID administration.

Indications
  • Gastric ulcer
  • Duodenal ulcer
  • Reflux esophagitis
  • Prevention of recurrence of gastric or duodenal ulcer during low-dose aspirin administration
  • Prevention of recurrence of gastric or duodenal ulcer during NSAID administration
  • Adjunct to Helicobacter pylori eradication
Pharmacology

Vonoprazan is a potassium competitive acid blocker (P-CAB) and does not require activation by acid. It inhibits H+, K+-ATPase in a reversible and potassium-competitive manner.

Dosage

Adult Dose (Oral):

  • Gastric ulcer: 20 mg once daily for 8 weeks
  • Duodenal ulcer: 20 mg once daily for 6 weeks
  • Reflux esophagitis: 20 mg once daily for 4 weeks; may extend up to 8 weeks
  • Maintenance of reflux esophagitis: 10 mg once daily; may increase to 20 mg once daily
  • Prevention of ulcer recurrence during low-dose aspirin or NSAID: 10 mg once daily
  • H. pylori eradication: 20 mg + amoxicillin 750 mg + clarithromycin 200 mg twice daily for 7 days
Side effects

Common Side Effects:

  • Diarrhea
  • Constipation
  • Drug hypersensitivity (including anaphylactic shock)
  • Drug eruption
  • Urticaria
  • Hepatotoxicity
  • Jaundice
  • Rash
  • Nausea
  • Abdominal distension
  • Abnormal liver function tests
  • Edema
  • Eosinophilia
Use in pregnancy

Use in Pregnancy: Use only if the expected therapeutic benefit is thought to outweigh any possible risk.

Pregnancy Category: C — always consult a doctor before taking during pregnancy.

Precautions & warnings
  • The course of the disease should closely be observed and the minimum therapeutic necessity should be used
  • In long-term treatment, close observation by such means as endoscopy should be made
  • In maintenance of healing of reflux esophagitis, administer only to patients who repeat recurrence and recrudescence
  • Unknown if alters ability to drive; caution advised
Overdose effects

Symptoms: No experience of overdose; not removed by hemodialysis.

Treatment: Symptomatic and supportive.

Storage conditions

Store below 30°C, in a cool and dry place. Keep away from light. Keep all the medicine out of the reach of children.

Vonoprazan — see the full informationPharmacology, precautions, pregnancy, overdose and the rest on the generic page
⚠️ This information is for educational purposes only — not a substitute for medical advice. Consult a registered physician before taking any medicine.