Granisetron is an antiemetic medicine used to treat and prevent nausea or vomiting caused after any surgical procedure or due to certain medicines, stomach upset, or cancer treatment. It also prevents nausea due to motion sickness to some extent.

The most common side effects of Granisetron are sleepiness, weakness, headache, constipation and diarrhea. However, these are not usually bothersome and resolve in some time on their own. Consult your doctor, if the symptoms worry you or persist for a longer duration. Your doctor will suggest ways to cope up with these side effects and to prevent them in future.

Granisetron did not show any adverse effects in research studies done on animals. However, since the safety and efficiency of Granisetron in pregnant women is unknown. It is not recommended to be used in women who are pregnant women or if you are planning to conceive unless prescribed by your doctor.

Granisetron and Ondansetron belong to the same class of medicines, that is serotonin 5-HT3 receptor antagonists. Both these medicines help prevent nausea and vomiting effectively. However, some studies suggest that Granisetron is more effective than Ondansetron. According to some reports, Granisetron is comparatively well tolerated, quicker in action and alleviates nausea and vomiting relatively faster.

Yes, Granisetron may cause constipation as one of the common side effects. However, this is usually not bothersome. Taking a fiber-rich diet can enhance your digestion and avoid constipation. You may also consider taking laxatives for relief and drink plenty of water too. Avoid drinking alcohol as it may worsen your constipation. If you still face issues, please consult your doctor to know about ways to treat it.