Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using sodium bicarbonate and call your doctor at once if you have:
severe stomach pain;
swelling, rapid weight gain; or
shortness of breath (even with mild exertion).
Common side effects may include:
dry mouth;
increased thirst; or
urinating more than usual.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Sodium bicarbonate side effects (more detail)
