Side Effects of Antiemetics


Antiemetics are a group of drugs that help to treat the symptoms of nausea and vomiting. Pepto-Bismol is one of the most well-known antiemetics. The use of antiemetics may lead to mild to severe side effects depending on the individual.


Antiemetics are a group of over-the-counter medications that treat individuals suffering from upset stomach, nausea and vomiting. Two examples of antiemetics include bismuth subsalicylates and antihistamines. According to, bismuth subsalicylates work by coating the stomach lining while antihistamines work by dulling the motion sensed by the inner ear. Antihistamines are thus useful in preventing nausea caused by motion sickness.

Less-Serious Side Effects

Less-serious side effects that may occur as a result of using antiemetics include darkening of the stool or tongue, drowsiness, dry mouth, mild nausea, stomach pain and headache. These side effects can become more serious if they worsen or regularly occur. Contact your doctor in such an event.

Serious Side Effects

Serious side effects that may occur due to the use of antiemetics include fever, hearing loss, extreme nausea, constipation, ringing ears, severe stomach pain, severe vomiting, heartburn and unusual weight gain. Allergic reaction marked by swelling of the face or throat may also occur as a result of using antiemetics. Contact your doctor immediately if any of these serious side effects arise.


Although antiemetic drugs can be acquired over-the-counter, discuss using any new drug with your doctor to avoid any possible drug interactions or side effects. Antiemetics are used to ease temporary nausea and vomiting. Do not take antiemetics for an extended time period without first contacting your doctor. If your symptoms worsen, you may need a prescription drug to treat your specific case.


Since antiemetics can cause dizziness and drowsiness, be sure to use extreme caution when driving or operating heavy machinery. Always follow the products dosage instruction exactly to avoid unwanted side effects. Because children and the elderly may be more susceptible to certain antiemetics, discuss the safety of specific products with your doctor.

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