Does Foundayo make you throw up?
Bottom line
Yes. Vomiting is listed among the common adverse reactions on Foundayo's own FDA label, published 2026-08-13. It clusters in the days after each dose increase. Foundayo steps up on a published schedule that reaches the maintenance dose at week 13, 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 9 mg, 14.5 mg or 17.2 mg daily and no longer stepping up, the trigger stops recurring.
Last updated 2026-08-13 — the FDA label this page quotes
Does Foundayo make you throw up?
Yes, and it is on the label rather than only in reports: vomiting appears among the common adverse reactions in Foundayo's FDA prescribing information, published 2026-08-13. Listed means it was seen often enough in the trials to be printed, not that everyone gets it. Vomiting is nausea that went further, and it comes from the same slowed stomach emptying. It clusters in the days after a dose increase and is the single most common reason people stop these drugs early. It clusters in the days after each dose increase. Foundayo steps up on a published schedule that reaches the maintenance dose at week 13, 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 9 mg, 14.5 mg or 17.2 mg daily and no longer stepping up, the trigger stops recurring. What helps, in the order worth trying: treating it as the escalation of nausea: smaller meals, less fat, slower eating; fluid in small amounts and often, rather than a large drink that sits; raising it with the prescriber before the next increase rather than after it. It stops being ordinary at a specific line: vomiting that stops you keeping fluids down, or lasts more than a day. Prolonged vomiting is the mechanism behind the acute kidney injury on these labels, and it is also how pulmonary aspiration under anaesthesia happens — tell any anaesthetist you are on this drug.
Why Foundayo does this
Vomiting is nausea that went further, and it comes from the same slowed stomach emptying. It clusters in the days after a dose increase and is the single most common reason people stop these drugs early.
When it happens, against Foundayo's own schedule
One tablet a day. Each row is a step up, and the days after each one are when this tends to arrive.
| Weeks | Dose |
|---|---|
| Days 1–30 | 0.8 mg daily |
| Days 31–60 | 2.5 mg daily |
| Days 61–90 | 5.5 mg daily |
| Day 91 and on | 9 mg → 14.5 mg → 17.2 mg |
What actually helps
- 1Treating it as the escalation of nausea: smaller meals, less fat, slower eating.
- 2Fluid in small amounts and often, rather than a large drink that sits.
- 3Raising it with the prescriber before the next increase rather than after it.
A tablet rather than an injection, and the same class effects: the route changes, the stomach does not. Nausea, diarrhoea, vomiting and constipation are the reason most people stop. They are worst in the first days after each dose increase and usually settle; a schedule held longer at one step is the standard answer, and it is a conversation with the prescriber rather than a reason to quit unannounced.
When to stop reading and call someone
Vomiting that stops you keeping fluids down, or lasts more than a day. Prolonged vomiting is the mechanism behind the acute kidney injury on these labels, and it is also how pulmonary aspiration under anaesthesia happens — tell any anaesthetist you are on this drug.
Separately, Foundayo carries a boxed warning. In rodents this molecule caused thyroid C-cell tumours at human-relevant doses. Whether it does so in people is unknown, and the label carries that as a boxed warning. It is contraindicated outright with a personal or family history of medullary thyroid carcinoma or MEN 2.
The other 3 common reactions on Foundayo's label
If you are thinking of switching
Vomiting 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 Foundayo is $299 a month at the maintenance dose here.
Every alternative to Foundayo, with each one's verified price and the date it was read →
Foundayo and vomiting, answered
- Does Foundayo make you throw up?
- Yes — vomiting is listed among the common adverse reactions on Foundayo's FDA prescribing information, published 2026-08-13. Listed means it was seen often enough in the trials to be printed, not that it happens to everyone.
- How long does Foundayo vomiting last?
- It clusters in the days after each dose increase. Foundayo steps up on a published schedule that reaches the maintenance dose at week 13, 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 9 mg, 14.5 mg or 17.2 mg daily and no longer stepping up, the trigger stops recurring.
- What helps with vomiting on Foundayo?
- Treating it as the escalation of nausea: smaller meals, less fat, slower eating. Fluid in small amounts and often, rather than a large drink that sits. Raising it with the prescriber before the next increase rather than after it.
- When is vomiting on Foundayo serious?
- Vomiting that stops you keeping fluids down, or lasts more than a day. Prolonged vomiting is the mechanism behind the acute kidney injury on these labels, and it is also how pulmonary aspiration under anaesthesia happens — tell any anaesthetist you are on this drug.
- Would switching drugs help?
- Possibly, and possibly not — vomiting 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 FOUNDAYO, published 2026-08-13. Information only, not medical advice — a symptom that worries you is a call to your prescriber, not a search result.