DESCRIPTION

ViniTM is a preparation of Vonoprazan. 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. Vonoprazan has a strong basicity and resides on the acid production site of gastric parietal cells for a long time, thereby inhibiting gastric acid production. Vonoprazan exerts a strong inhibitory effect on formation of mucosal damage in upper part of the gastrointestinal tract. Vonoprazan does not exhibit anti-Helicobacter pylori activity nor inhibitory activity against Helicobacter pylori urease.

INDICATIONS

DOSAGE AND ADMINISTRATION

Gastric ulcer and duodenal ulcer: The usual adult dosage for oral use is 20mg of Vonoprazan administered orally once daily an 8 weeks treatment for gastric ulcer and a 6 weeks treatment for duodenal ulcer.

Reflux esophagitis: The usual adult dose for oral use is 20mg of Vonoprazan administered once daily for a total of 4 weeks of treatment. If that dosing proves insufficient, the administration should be extended, but for no longer than 8 weeks of treatment.

For the maintenance therapy of reflux esophagitis showing recurrence and recrudescence, the dose for oral use is 10mg of Vonoprazan once daily. However, when the efficacy is inadequate, the dosage may be increase up to 20mg of Vonoprazan once daily.

Prevention of recurrence of gastric or duodenal ulcer during low-dose aspirin administration: The usual adult dosage is one tablet of 10mg of Vonoprazan administered orally once daily.

Prevention of recurrence of gastric or duodenal ulcer during non-steroidal anti-inflammatory drug (NSAID) administration: The usual adult dosage is one tablet of 10mg of Vonoprazan administered orally once daily.

Adjunct to Helicobacter pylori eradication

For adults, the following three-drug regimen should be administered orally at the same time twice daily for seven days: 20mg of Vonoprazan, 750mg of amoxicillin hydrate and 200mg of clarithromycin. The dose of clarithromycin may be increased as clinically warranted. However, dosage should not exceed 400mg twice daily.

If Helicobacter pylori eradication with a three-drug regimen comprising a proton pump inhibitor, amoxicillin hydrate and clarithromycin has been unsuccessful, as an alternative treatment, adults should be administered the following three drugs orally twice daily for seven days: 20mg of Vonoprazan, 750mg of amoxicillin hydrate and 250mg of metronidazole.

CONTRAINDICATIONS

• Patients with hypersensitivity to Vonoprazan or to any excipient of the product.

• Patients receiving Atazanavir sulphate, Nelfinavir or Rilpivirine hydrochloride.

SIDE EFFECTS

Diarrhea, constipation, drug hypersensitivity (including anaphylactic shock), drug eruption, urticaria, hepatotoxicity, jaundice, rash, nausea, abdominal distension, gamma-glutamyl transferase increased, AST increased, Liver function test abnormal, ALT increased, ALP increased, LDH increased, γ - GPT increased, edema and eosinophilia.