alosetron vs dronabinol
Side-by-side comparison of alosetron and dronabinol Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Lotronex
Marinol
Alosetron (Lotronex) is a medicine for women with severe diarrhea-predominant irritable bowel syndrome (IBS). It helps to reduce diarrhea and stomach pain.
Dronabinol capsules contain a synthetic form of THC, the active ingredient in marijuana. It is used to treat loss of appetite in AIDS patients and nausea/vomiting from chemotherapy.
Alosetron is used to treat severe diarrhea-predominant irritable bowel syndrome (IBS) in women. It is for women whose IBS symptoms have lasted for 6 months or longer. You should have already ruled out other possible causes of your symptoms. This medicine is only for you if other treatments have not worked well enough.
Dronabinol is used to treat loss of appetite and weight loss in adults with Acquired Immune Deficiency Syndrome (AIDS). It also helps with nausea and vomiting caused by cancer chemotherapy when other treatments don't work well. Dronabinol can help you eat more and feel less sick.
Alosetron blocks a substance called serotonin in your gut. Serotonin can speed up bowel movements. By blocking serotonin, alosetron slows down your bowel and reduces diarrhea.
Dronabinol works by activating cannabinoid receptors in your brain. These receptors affect appetite, mood, and the sensation of nausea. By activating these receptors, dronabinol can increase appetite and reduce nausea and vomiting.
- • Constipation
- • Abdominal discomfort and pain
- • Nausea
- • Gastrointestinal discomfort and pain
- • Abdominal pain
- • Dizziness
- • Feeling very happy
- • Nausea
- • Feeling paranoid
- Medicine not working 11
- Diarrhea 10
- Feeling sick to your stomach 8
- Using the medicine for something it's not approved for 7
- Stomach pain 6
- Feeling sick to your stomach 878
- Feeling very tired 696
- Loose, watery stools 604
- Death 593
- Throwing up 581
Alosetron can cause serious gut problems, like ischemic colitis (reduced blood flow to the bowel) and severe constipation. These problems can lead to hospitalization, surgery, or even death. Stop taking alosetron right away if you get constipated or have symptoms of ischemic colitis, like bloody diarrhea or bad stomach pain. Call your doctor immediately.
Dronabinol can cause mental and mood changes. Tell your doctor if you have a history of mental illness. Do not drive or operate heavy machinery until you know how this medicine affects you. This medicine can also affect your heart, causing changes in blood pressure or heart rate. Dronabinol may also increase the risk of seizures.
It is not known if alosetron can harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is also not known if alosetron passes into breast milk. Talk to your doctor about the best way to feed your baby if you take alosetron.
Dronabinol may harm your unborn baby. Avoid using this medicine if you are pregnant. If you are breastfeeding and have HIV, do not breastfeed due to the risk of passing HIV to your baby.
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How to Read This alosetron vs dronabinol Comparison
alosetron is classified in the 5-HT3 Antagonist (IBS-D) drug class, while dronabinol sits within the Cannabinoid Antiemetic class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, alosetron has 42 submissions while dronabinol has 3,352. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between alosetron and dronabinol — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.