Frequently asked questions
Everything you need to know about Foundayo
Foundayo is a new prescription medicine for weight management made by Eli Lilly the same company which founded the blockbuster drug Mounjaro. Foundayo contains the active ingredient orforglipron is a small-molecule, non-peptide drug, which allows it to be taken as a tablet rather than an injection.
It is used for weight management in adults who initially have:
- A BMI of 30 kg/m² or greater (obesity), or
- A BMI of 27 kg/m² or greater but below 30 kg/m² (overweight) and at least one weight-related health problem.
Weight-related health problems can include:
- Prediabetes
- Type 2 diabetes
- High blood pressure
- Abnormal blood fat levels
- Obstructive sleep apnoea
- Cardiovascular disease
Foundayo contains Orforglipron, which influences the body's appetite-regulation pathways.
This can help you:
- Feel fuller after eating
- Reduce your appetite
- Eat less food
- Reduce overall calorie intake
- Support gradual and sustained weight loss
Foundayo should be used together with a reduced-calorie diet and increased physical activity.
No. There is no Mounjaro pill or tablet. Mounjaro contains Tirzepatide and is given as a once-weekly injection. Foundayo contains Orforglipron and is a separate once daily tablet developed by Eli Lilly.
Foundayo is taken once a day.
Treatment is started at a low dose and increased gradually. This allows your body to adjust to the medicine and may help reduce gastrointestinal side effects.
The licensed dose escalation schedule is:
| Treatment stage | Dose | Minimum duration |
|---|---|---|
| Starting dose | 0.8 mg once daily | 30 days |
| Step 2 | 2.5 mg once daily | At least 30 days |
| Step 3 | 5.5 mg once daily | At least 30 days |
| Step 4 | 9 mg once daily | At least 30 days |
| Step 5 | 14.5 mg once daily | At least 30 days |
| Maximum dose | 17.2 mg once daily | As prescribed |
Your doctor or pharmacist will tell you when to increase your dose.
- Do not increase your dose yourself.
- The maximum daily dose is 17.2 mg.
- You can take Foundayo at any time of day, with or without food.
- Swallow the tablet whole. Do not break, crush or chew it.
- Do not take more than one tablet per day.
If you forget to take Foundayo, take the dose when you remember.
However, do not take more than one dose in a day and do not take a double dose to make up for a missed tablet.
If you are unsure what to do, speak to your pharmacist or healthcare professional.
Like all medicines, Foundayo can cause side effects, although not everyone will experience them.
The most common side effects are related to the digestive system.
Very common side effects include:
- Nausea (feeling sick)
- Constipation
- Diarrhoea
- Vomiting
- Indigestion
- Abdominal pain
Nausea, diarrhoea and vomiting are particularly common when treatment is first started and generally decrease over time in most people.
Foundayo should not be used during pregnancy.
If you are pregnant, think you may be pregnant or are planning to become pregnant, speak to your healthcare professional.
If you wish to become pregnant, you should discuss your treatment with your doctor and stop Foundayo at least 3 weeks before trying to become pregnant.
No.
It is not known whether orforglipron passes into breast milk, and a risk to newborns and infants cannot be ruled out. Foundayo should therefore not be used while breastfeeding.
Yes, this is an important consideration.
Orforglipron may reduce the effectiveness of oral hormonal contraceptives.
If you use an oral contraceptive, the patient leaflet recommends considering an additional barrier method, such as a condom, or changing to a non-oral contraceptive method for:
- 30 days after starting Foundayo, and
- 30 days after each increase in dose
Speak to your healthcare professional if you are unsure which form of contraception is appropriate for you.
Tell your prescriber if you have severe problems with digestion or a condition where food remains in your stomach for longer than normal, including severe gastroparesis.
Foundayo can cause gastrointestinal side effects such as nausea, vomiting, diarrhoea, constipation, abdominal pain, bloating and reflux.
Your prescriber will decide whether Foundayo is appropriate for you.
Tell your healthcare professional if you have or have had gallbladder problems.
Seek medical advice if you develop symptoms such as:
- Pain in the upper abdomen
- Yellowing of the skin or eyes
- Pale or clay-coloured stools
- Fever
Gallstones are listed as a common side effect of Foundayo.
Foundayo tablets should be:
- Kept out of the sight and reach of children
- Stored in the original packaging to protect them from light
- Kept until the expiry date shown on the packaging
Foundayo does not require refrigeration
Foundayo is available in blister packs containing 30 tablets
A 30-tablet pack represents approximately one month's treatment when taking one tablet per day.
Both medicines are prescription treatments used as part of a medical weight-management programme, but they contain different active ingredients and are taken differently.
| Foundayo | Wegovy Oral tablet | |
|---|---|---|
| Active ingredient | Orforglipron | Semaglutide |
| Type | Oral tablet | Oral tablet |
| How often | Once daily | Once daily |
| Administration | Swallowed whole with or without food | swallowed whole after 8 hour fast, no food for subsequent 30 minutes |
| Refrigeration | Not required | Not required |
| Maximum licensed dose | 17.2 mg daily | 25mg daily |
| Effects contraception | Yes - take additional precautions | No- no need to change regimen. |
| Weight loss estimations | 12.4% | 16% |
Your healthcare professional can help you decide which treatment is most appropriate based on your medical history, preferences and treatment goals.
Everyone responds differently to weight-management treatment.
Your results can depend on factors including your starting weight, diet, physical activity, dose, medical history and how your body responds to treatment. In clinical trial participants lost on average around 12.4% of their body weight over 72 weeks
If you take more Foundayo than you should, contact your doctor immediately.
Do not take more than one tablet per day.
When used correctly, Foundayo is safe and has been approved by the MHRA. Foundayo is a prescription-only medicine and should only be used following an assessment by an appropriate healthcare professional.
Always read the Patient Information Leaflet supplied with your medicine.
Important information
This page is for general information and does not replace the official Patient Information Leaflet or individual medical advice.
Foundayo is a prescription-only medicine. It is not suitable for everyone and should only be used following an assessment by a qualified healthcare professional.
Our Clinical Authors
This page has been written by a registered UK pharmacist and reviewed by our clinical team to ensure it is accurate, clear and reflects current clinical guidance.
Last medically reviewed: 07 September 2026
Last updated: 07 September 2026