Dramamine is an excellent antinausea medication, but can make you drowsy so don't take it if you have to operate heavy machinery or drive your car. Certain over-the-counter medications can block the production of stomach acid. They include Prilosec OTC (a Proton Pump Inhibitor) and Zantac. Talk to your doctor about what will be the best choice for you. For occasional relief of acid reflux, heartburn and indigestion, use antacids such as Gaviscon, Maalox and TUMS. If you have a lot of gas and bloating, Gas-X and Beano can help you control symptoms. If you get diarrhea, Imodium can help stop it, although if your diarrhea continues for more than a day or two and your health is affected by it, you may want to discuss the situation with your doctor.