Vonoprazan is used to treat conditions where the stomach produces too much acid, such as stomach ulcers and gastroesophageal reflux disease (GERD).

Vonoprazan is considered to be more effective in reducing stomach acid compared to older medications like proton pump inhibitors (PPIs). It works more quickly and can be effective in patients who do not respond well to traditional PPIs.

Vonoprazan is fast-acting and can start reducing acid production within hours of taking the medication. However, it may take several days to weeks for full healing of ulcers and relief of GERD symptoms.

Vonoprazan is generally safe for long-term use under medical supervision. However, like all medications, it should be used according to your doctor's instructions and regular check-ups may be needed to monitor its effects.

It is important to inform your doctor about any other medications you are taking, as well as any medical conditions you have, especially liver disease or pregnancy, as these may affect how Vonoprazan works or if it's safe for you to take.