Most flatulence does not need medicine. Medicines may help in selected cases, and the cause should be treated where possible.

Over-the-counter options

Simethicone. Breaks up gas bubbles. Often used for bloating, but evidence that it reduces gas is limited and mixed.
Lactase enzyme. Taken with dairy by people with lactose intolerance. It can reduce gas, bloating and diarrhoea after milk.
Alpha-galactosidase (for example in some bean-enzyme products). May reduce gas after beans and pulses in some people.
Activated charcoal. Evidence is weak, and it can interfere with other medicines. Not routinely advised.
Peppermint oil capsules. May ease cramps and bloating in IBS for some people. They can cause heartburn.
Fibre supplements such as psyllium. They help constipation but can increase gas at first, so start low.

Prescription treatment for the cause

Medicines and Products for Flatulence

Introductory Summary