Does Contrave make you feel sick?
Bottom line
Yes. Nausea 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.
Last updated 2025-11-17 — the FDA label this page quotes
Does Contrave make you feel sick?
Yes, and it is on the label rather than only in reports: nausea 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 everyone gets it. These drugs slow how fast the stomach empties. Food sits longer, the stomach stays fuller for longer, and the brain reads that as fullness — which is part of how the drug works rather than a malfunction. The same mechanism is what produces nausea, which is why the two arrive together and why the nausea eases as the stomach adapts to a dose. 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: smaller meals, eaten more slowly. A stomach emptying at half speed cannot take a normal-sized plate; stopping at the point of fullness rather than at the end of the plate — the signal arrives earlier than it used to; less fat and less fried food, which are the slowest things to leave the stomach; holding at the current dose for another four weeks instead of stepping up. This is a conversation with the prescriber and it is the standard answer, not a failure. It stops being ordinary at a specific line: vomiting that will not stop, severe abdominal pain that goes through to the back, or signs of dehydration. Prolonged vomiting is the route to acute kidney injury listed on these labels, and pain radiating to the back is how pancreatitis presents.
Why Contrave does this
These drugs slow how fast the stomach empties. Food sits longer, the stomach stays fuller for longer, and the brain reads that as fullness — which is part of how the drug works rather than a malfunction. The same mechanism is what produces nausea, which is why the two arrive together and why the nausea eases as the stomach adapts to a dose.
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
- 1Smaller meals, eaten more slowly. A stomach emptying at half speed cannot take a normal-sized plate.
- 2Stopping at the point of fullness rather than at the end of the plate — the signal arrives earlier than it used to.
- 3Less fat and less fried food, which are the slowest things to leave the stomach.
- 4Holding at the current dose for another four weeks instead of stepping up. This is a conversation with the prescriber and it is the standard answer, not a failure.
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
Vomiting that will not stop, severe abdominal pain that goes through to the back, or signs of dehydration. Prolonged vomiting is the route to acute kidney injury listed on these labels, and pain radiating to the back is how pancreatitis presents.
Separately, Contrave carries a boxed warning. Bupropion raises the risk of suicidal thoughts and behaviour 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.
The other 3 common reactions on Contrave's label
If you are thinking of switching
Nausea is on the label of most drugs in this class, so a switch is not a reliable way out of 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 →
Contrave and nausea, answered
- Does Contrave make you feel sick?
- Yes — nausea 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 nausea 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 nausea on Contrave?
- Smaller meals, eaten more slowly. A stomach emptying at half speed cannot take a normal-sized plate. Stopping at the point of fullness rather than at the end of the plate — the signal arrives earlier than it used to. Less fat and less fried food, which are the slowest things to leave the stomach. Holding at the current dose for another four weeks instead of stepping up. This is a conversation with the prescriber and it is the standard answer, not a failure.
- When is nausea on Contrave serious?
- Vomiting that will not stop, severe abdominal pain that goes through to the back, or signs of dehydration. Prolonged vomiting is the route to acute kidney injury listed on these labels, and pain radiating to the back is how pancreatitis presents.
- Would switching drugs help?
- Possibly, and possibly not — nausea is listed on the labels of most drugs in this class, so a switch is not a way out of it by default. What a switch does change is the price: every verified route to each molecule is priced on this site with the date each figure was read.
Everything above is read from FDA prescribing information for CONTRAVE, published 2025-11-17. Information only, not medical advice — a symptom that worries you is a call to your prescriber, not a search result.