Does Contrave cause diarrhea?
Bottom line
Yes. Diarrhea is listed among the common adverse reactions on Contrave's own FDA label, published 2025-11-17. It clusters in the days after each dose increase. Contrave steps up on a published schedule that reaches the maintenance dose at week 4, so the pattern most people see is a few rough days after each step and a settling in between — not one long stretch. Once you are at 2 tablets twice a day and no longer stepping up, the trigger stops recurring.
No clinician has reviewed this page. What it says the label or a trial says is quoted from the FDA label or the trial cited beside it, general guidance is marked as such, and every price carries the date it was verified — but that is sourcing, not medical review, and the two are not the same thing. What we do and do not check · Who checked the price
Last updated 2025-11-17 — the FDA label this page quotes. Read and dated by Alex Seot.
Does Contrave cause diarrhea?
Yes, and it is on the label rather than only in reports: diarrhea appears among the common adverse reactions in Contrave's FDA prescribing information, published 2025-11-17. Listed means it was seen often enough in the trials to be printed, not that it happens to everyone. Contrave is not a GLP-1, and its label lists diarrhea among the common reactions without naming a mechanism. It clusters in the days after each dose increase. Contrave steps up on a published schedule that reaches the maintenance dose at week 4, so the pattern most people see is a few rough days after each step and a settling in between — not one long stretch. Once you are at 2 tablets twice a day and no longer stepping up, the trigger stops recurring. What helps, in the order worth trying: plain, low-fat food for a few days after each dose increase; fluid and electrolytes, because this is the side effect that dehydrates fastest; holding the dose rather than stepping up, if it arrives with each increase. It stops being ordinary at a specific line: diarrhea that lasts more than a couple of days, or comes with fever, blood, or signs of dehydration.
Why Contrave does this
Contrave is not a GLP-1, and its label lists diarrhea among the common reactions without naming a mechanism.
When it happens, against Contrave's own schedule
Tablets, twice a day. Each row is a step up, and the days after each one are when this tends to arrive.
| Weeks | Dose |
|---|---|
| Week 1 | 1 tablet in the morning |
| Week 2 | 1 morning, 1 evening |
| Week 3 | 2 morning, 1 evening |
| Week 4 and on | 2 morning, 2 evening |
What actually helps
- 1Plain, low-fat food for a few days after each dose increase.
- 2Fluid and electrolytes, because this is the side effect that dehydrates fastest.
- 3Holding the dose rather than stepping up, if it arrives with each increase.
This is not a GLP-1: it is naltrexone plus bupropion, and its risks are neurological and cardiovascular rather than gastrointestinal. Anyone taking an opioid, including buprenorphine for addiction, cannot take it at all.
When to stop reading and call someone
Diarrhea that lasts more than a couple of days, or comes with fever, blood, or signs of dehydration.
Separately, Contrave carries a boxed warning. Bupropion raises the risk of suicidal thoughts and behavior in children, adolescents and young adults. The label carries that as a boxed warning and tells prescribers to watch for mood changes, particularly in the first months and after any dose change.
Other reactions on Contrave's label with a page of their own
If you are thinking of switching
Diarrhea is on 12 of the 13 FDA labels tracked here, so the other labels are worth reading before assuming a switch avoids it. What a switch does change is what you pay, and Contrave is $99 a month at the maintenance dose here.
Every alternative to Contrave, with each one's verified price and the date it was read →
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Contrave and diarrhea, answered
- Does Contrave cause diarrhea?
- Yes — diarrhea is listed among the common adverse reactions on Contrave's FDA prescribing information, published 2025-11-17. Listed means it was seen often enough in the trials to be printed, not that it happens to everyone.
- How long does Contrave diarrhea last?
- It clusters in the days after each dose increase. Contrave steps up on a published schedule that reaches the maintenance dose at week 4, so the pattern most people see is a few rough days after each step and a settling in between — not one long stretch. Once you are at 2 tablets twice a day and no longer stepping up, the trigger stops recurring.
- What helps with diarrhea on Contrave?
- Plain, low-fat food for a few days after each dose increase. Fluid and electrolytes, because this is the side effect that dehydrates fastest. Holding the dose rather than stepping up, if it arrives with each increase.
- When is diarrhea on Contrave serious?
- Diarrhea that lasts more than a couple of days, or comes with fever, blood, or signs of dehydration.
- Would switching drugs help?
- Possibly. Diarrhea is on 12 of the 13 FDA labels tracked here, so the other labels are worth reading before assuming a switch avoids it. What a switch does change is the price: every verified route is priced on this site with the date each figure was read.
The listing, the schedule and the warnings are read from FDA prescribing information for CONTRAVE, published 2025-11-17; the notes on why it happens and what helps are general guidance, not label text. Information only, not medical advice — a symptom that worries you is a call to your prescriber, not a search result.