Foundayo (orforglipron) is a glucagon-like peptide-1 (GLP-1) agonist used for weight management. While Foundayo can be effective, it can interact with other medicines.
A drug interaction happens when a medicine or substance affects how another medicine works in the body. Some medicines don’t mix well because they change how a medicine is absorbed or broken down in the body, or because they have overlapping side effects.
This article does not include a complete list of interactions. Always tell your health care provider and pharmacist about all prescription drugs, over-the-counter medicines, and any vitamins, herbs, or other supplements you use. Checking with your health care team before taking new medicines can help you avoid unsafe combinations while taking Foundayo.
Understanding Foundayo Interactions
After you take Foundayo, your body processes it using certain enzymes. Some medicines can affect how these enzymes work. This can change how much Foundayo is in your body.
Foundayo can also slow down how quickly food and other medicines leave your stomach, which may change how quickly other oral medicines are absorbed into your body.
Below are more details about some specific Foundayo interactions:
1. Certain medicines for infections
Some medicines used for bacterial, fungal, or viral infections may interact with Foundayo.
Examples include:
- Clarithromycin
- Itraconazole
- Ketoconazole
- Ritonavir
These medicines block a certain enzyme in the body called CYP3A4. When this enzyme is blocked, the body may break down Foundayo more slowly. This may result in a buildup of Foundayo in the body, increasing the risk of side effects.
Some of these medicines also affect how Foundayo is transported in the body, which can further increase Foundayo levels. These combinations should be avoided.
If you must take certain antibiotics, antifungals, or antiviral medicines while taking Foundayo, your health care provider may lower your Foundayo dose and monitor you more closely for side effects.
2. Some seizure medicines
Certain seizure medicines can interact with Foundayo in a way that could make Foundayo less effective.
Examples include:
- Carbamazepine
- Phenytoin
These medicines increase the activity of an enzyme in your body called CYP3A4. This enzyme helps break down Foundayo. When CYP3A4 becomes more active, your body breaks down Foundayo faster than usual. As a result, Foundayo levels may be lower than expected, which can reduce how well it works.
Some medicines should not be taken with Foundayo because they can significantly lessen its effectiveness. If you need to take one of these medicines, your health care provider may monitor your response more closely and adjust your Foundayo dose if needed.
3. Simvastatin
Simvastatin is a medicine used to lower cholesterol.
Taking both Foundayo and simvastatin can increase the amount of simvastatin in your body. This may increase the risk of side effects from simvastatin, such as muscle problems.
If you take simvastatin and Foundayo, your health care provider may adjust your dose of simvastatin.
4. Insulin and certain diabetes medicines
Foundayo can increase your body’s natural insulin release when blood sugar levels go up. When Foundayo is combined with insulin or certain diabetes medicines, the risk of low blood sugar (hypoglycemia) may increase.
Examples include:
Your health care provider may lower the dose of these medicines when you start Foundayo. Do not change your dose on your own. Your health care provider may also suggest checking your blood sugar at home more often.
Watch for symptoms of low blood sugar, such as shakiness, sweating, confusion, or dizziness. Keep a source of fast-acting sugar on hand in case of low blood sugar, such as glucose tablets or fruit juice.
5. Birth control pills
Foundayo can slow how quickly medicines move through your stomach. This may affect how well birth control pills work to prevent pregnancy.
This interaction may be more likely when you first start Foundayo or after a dose increase.
If you take oral contraceptives, your health care provider may recommend switching to a non-oral method, such as an intrauterine device (IUD), implant, or injection. Or they may suggest continuing your birth control pill and adding a backup barrier method, such as condoms. These measures are recommended for 30 days after starting Foundayo and for 30 days after each dose increase.
If you can become pregnant, your health care provider can help you decide the right birth control methods while taking Foundayo.
6. Other medicines that are swallowed
Because Foundayo can slow how quickly medicines leave your stomach, it may affect how quickly other oral medicines are absorbed. Oral medicines are forms that you swallow, such as tablets, capsules, or liquids.
This effect may be strongest when you first start Foundayo and may decrease over time.
Tell your health care provider about any medicines or supplements that you take by mouth. They can help decide if any changes are needed.
7. Other GLP-1 agonists
Foundayo should not be used with other medicines that contain GLP-1 agonists. GLP-1s are commonly used for type 2 diabetes or weight loss.
Examples include:
- Dulaglutide
- Liraglutide
- Semaglutide
Using more than one GLP-1 agonist at the same time is not recommended. These medicines work in similar ways to control appetite and blood sugar. Combining them may increase the risk of side effects without providing additional benefit.
If you are switching from another GLP-1 medicine to Foundayo (or vice versa), your health care provider will guide you on when to stop one medicine and start the other.
Foundayo and Alcohol
There are no known interactions between Foundayo and alcohol. However, alcohol may worsen certain side effects of Foundayo, such as nausea or stomach discomfort.
Other Interactions With Foundayo
Supplement Interactions
The drugmaker of Foundayo does not list specific supplement interactions in the medicine’s labeling. But your health care provider may still tell you to avoid St. John’s wort while taking Foundayo. It’s an herb sometimes used for depression. The combination may make Foundayo less effective.
St. John’s wort can increase the activity of an enzyme called CYP3A4, which may cause Foundayo to be broken down faster in your body, lowering the amount of medicine in your blood.
Other herbs and dietary supplements may cause interactions. Tell your health care team about all supplements you take.
Food Interactions
Foundayo can be taken with or without food.
The drugmaker of Foundayo does not mention grapefruit or grapefruit juice as an interaction on the medicine’s labeling. Still, your health care provider may recommend limiting or avoiding grapefruit and grapefruit juice while taking Foundayo. The combination may increase the risk of Foundayo side effects.
Grapefruit juice can block an enzyme called CYP3A4 in the intestines, which may cause higher levels of some medicines to build up in your body and increase the risk of side effects.
FAQs About Foundayo Interactions
Does Foundayo interact with ibuprofen?
There is no known interaction between Foundayo and ibuprofen specifically.
However, Foundayo can slow down the rate at which your stomach empties into the intestine. The intestine is where many medicines are absorbed into the bloodstream so they can start working. Delayed stomach emptying may affect how quickly some oral medicines, including ibuprofen, are absorbed. In most cases, this is not expected to cause a major problem, but it could change how quickly the medicine starts working.
If you take ibuprofen regularly and feel it is not working as expected, talk to your health care provider. They can help decide if any changes are needed.
Can I drink coffee with Foundayo?
There are no known interactions between Foundayo and coffee.
However, coffee may cause or worsen diarrhea or heartburn in some people, especially if you add creamer or other dairy products. You may want to limit or avoid coffee if you’re having stomach-related side effects of Foundayo, such as diarrhea, nausea, or indigestion.
How to Avoid Foundayo Interactions
You can loweryour risk of drug interactions by:
- Taking Foundayo exactly as prescribed
- Keeping an updated medication list and sharing it with your health care team and pharmacist before starting any new medicine or supplement
- Properly disposing of unused or expired medicines to prevent accidental use or interactions
Your health care provider and pharmacist can help identify possible interactions and make sure your treatment plan is safe and effective.
