Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Loperamide (Imodium A-D) and alosetron (Lotronex) are both antidiarrheal medications, but they have different uses and availability. Loperamide is available over-the-counter and by prescription, and it treats general diarrhea, including travelers' diarrhea and diarrhea from chronic gut conditions. It works by slowing down bowel movements and reducing fluid in the intestines. Alosetron, on the other hand, is prescription-only and specifically used for severe diarrhea-predominant irritable bowel syndrome (IBS-D) in women. It works by blocking serotonin receptors in the gut to reduce abdominal pain and discomfort. Loperamide can be used by both adults and children (with specific dosing), while alosetron is not indicated for men and has more restrictions due to serious gastrointestinal risks. Additionally, loperamide acts quickly, whereas alosetron may take a few weeks to show full effects. Both medications have potential side effects, but alosetron carries a higher risk of severe complications like ischemic colitis.
Imodium multi-symptom relief
Alosetron (Lotronex)
Imodium multi-symptom relief
Alosetron (Lotronex)
Summary of Imodium (multi symptom) vs. Alosetron
Summary for Antidiarrheal / Antiflatulent
Imodium Multi-Symptom Relief is a combination medication that contains loperamide and simethicone. It's used to relieve symptoms of diarrhea and bloating and cramps from gas. Loperamide is an antidiarrheal medication, while simethicone helps ease gassiness (flatulence). Imodium Multi-Symptom Relief can be used for people over the age of 6. In general, you can take a tablet after each loose stool (up until the maximum daily dose). Imodium Multi-Symptom Relief is found over the counter as brand-name and generic versions. Side effects aren't common but can include tiredness and dizziness.
Summary for Antidiarrheal
Prescription only
Alosetron (Lotronex) is a serotonin antagonist. It's used to treat severe irritable bowel syndrome with diarrhea (IBS-D) in adult females. But alosetron (Lotronex) isn't a first-choice option and is typically only prescribed when other treatments haven't worked well. Alosetron (Lotronex) comes as tablets that are taken by mouth, typically twice a day. Some common side effects include constipation, stomach pain, and nausea. It's available under the brand name Lotronex and as a lower-cost generic.
Indications of Imodium (multi symptom) vs. Alosetron