Foundayo (orforglipron) side effects & how to manage them

Foundayo contains the active ingredient orforglipron, a non-peptide glucagon-like peptide-1 (GLP-1) receptor agonist approved for weight loss. Unlike other GLP-1s, such as Mounjaro or Wegovy, which are available as weekly injections, Foundayo is a daily pill that can be taken with or without food, making it a more flexible option compared to the Wegovy pill.

Here, we explore the potential side effects of Foundayo, how to manage them, and when to seek medical advice.

The most common side effects of Foundayo (orforglipron) are similar to other GLP-1 medications and are mainly gastrointestinal, such as feeling sick, being sick, constipation, and diarrhoea. Most of the common side effects are mild and temporary and can be managed at home.

Serious side effects are possible while taking Foundayo, but are less common than those of some of the others listed. However, a key difference is that these side effects cannot be managed at home and will require you to see a doctor, and in some cases, can be an emergency.

The potential serious Foundayo side effects are:

1. An inflamed pancreas (pancreatitis) – Symptoms include severe stomach and back pain that does not go away. This is a serious medical condition and, in severe cases, can be life-threatening, so you must see a doctor straight away if you get any of these symptoms.
2. Vision changes – Any changes in your vision or other visual symptoms should be reported to your doctor.
3. Bowel obstruction – You may experience severe stomach pain, a swollen or bloated stomach, being sick, or being unable to pass wind or open your bowels.
4. Severe constipation – Signs include being unable to pass stools, hard or lumpy stools, straining, severe stomach pain, or leaking water stools around a hard blockage.
5. Serious allergic reactions – Also known as an anaphylactic reaction, allergic reactions are an emergency and require immediate medical attention. Symptoms include difficulty breathing or swallowing, swelling of the face and throat, wheezing, fast heartbeat, pale and cold skin, dizziness, or weakness.
6. Kidney problems – Sometimes kidney problems requiring kidney dialysis have been reported, and symptoms include dehydration caused by being sick or diarrhoea.

If you have any surgery booked, it is important that you let your doctor or surgeon know that you are taking Foundayo, as it can increase the risk of food or liquid entering your lungs during surgery or other procedures.

Although common Foundayo side effects can be uncomfortable and disrupt your daily life, there are steps you can take to manage them at home. If you get any symptoms that are difficult to manage, are getting worse, or are severely impacting your quality of life, you should speak to your doctor.

Nausea

Nausea or feeling sick is one of the most common Foundayo side effects, although it does not always lead to vomiting. Most people can manage nausea by:

• eating smaller, more frequent meals, it can help to eat 6 smaller meals per day rather than 3 larger meals
• eating slowly and listening to your body when it tells you that you are full, so that you stop eating
• avoiding high-fat, greasy, or spicy foods that can irritate your stomach and cause nausea
• drinking peppermint or ginger herbal teas to help settle and soothe your stomach
• avoiding lying down immediately after eating

Constipation

Constipation can make you feel uncomfortable, causing symptoms such as bloating, passing stools less frequently, and straining on the toilet. Try managing constipation by:

• slowly increasing your fibre intake to help soften stools, high-fibre foods include fruit, vegetables, wholegrains, beans, and legumes
• sipping water or fluids throughout the day, especially if you are getting any other digestive-related side effects
• incorporating some gentle exercise into your daily routine, such as as a short walk after a meal
• speaking to a pharmacist about over-the-counter laxatives or other constipation-relieving medications that are safe to take with Foundayo

Diarrhoea

Foundayo works by binding to GLP-1 receptors in the body, so it can alter how the gut moves and processes fluid, causing diarrhoea in some people. You can manage this by:

• staying hydrated with water or electrolyte drinks throughout the day to help replace any fluids you lose and minimising the chance of constipation
• choosing bland foods which are less likely to irritate your digestive system and are easy to digest, such as rice, crackers, toast, and bananas
• speaking to a pharmacist about over-the-counter anti-diarrhoea medications that are safe to take with Foundayo

Why dose titration matters

When you start Foundayo, you will begin on a low starting dose of 0.8mg per day, which is slowly increased every 30 days until you reach the maximum dose of 17.2mg, or a dose that is effective for you. Taking Foundayo in this way gives your body time to adjust to orforglipron and can reduce the severity of digestive side effects. The most common side effects, such as nausea, vomiting, and diarrhoea, are most likely to occur when you first start treatment or after a dose increase.

Lifestyle factors that make side effects worse

Certain lifestyle habits can make some digestive side effects more noticeable. Because orforglipron reduces your appetite and delays the time it takes for food to move through your stomach, larger meals can leave you feeling uncomfortably full and make effects such as nausea, bloating, indigestion, and vomiting worse.

Some of the lifestyle factors that can make Foundayo side effects worse include:

• alcohol – alcohol can irritate your stomach and make feeling sick, indigestion, or dizziness worse. It can also cause dehydration and increase the risk of low blood sugar if you take certain diabetes medications
• eating large or fatty meals – large meal portions and high-fat foods take longer to digest, potentially worsening nausea, reflux, and indigestion
• becoming dehydrated – side effects such as being sick and diarrhoea cause fluid loss, while a reduced appetite may make you drink less than usual
• lack of exercise – not getting enough exercise can cause effects like bloating, constipation, and feeling full more uncomfortable, it can also mean you do not get the results you were expecting from Foundayo

Foundayo does not work on its own. You will need to adjust your current lifestyle to get the full weight loss benefits of orforglipron. This includes following a reduced-calorie diet and increasing your exercise.

Foundayo side effects generally last from a few days to 2 weeks, depending on how your body responds to orforglipron. They often peak within the first 2 weeks of starting Foundayo or after you increase your dose. However, for most people, Foundayo side effects will ease as your body gets used to the medication.

If you get any side effects that last longer than 2 weeks or are difficult to manage, you should contact your doctor for advice. They may advise you to lower your dose or suggest an alternative weight loss treatment.

Will Foundayo pill side effects go away on their own?

Yes, many of the digestive side effects caused by Foundayo will go away on their own as your body gets used to orforglipron, and can often be managed at home by making small changes to your lifestyle, eating, and exercise habits.

Most Foundayo side effects are mild, temporary, and manageable, but some symptoms will need medical attention, either urgently or immediately.

If you get any of the following side effects, call 999 or get someone to take you to A&E immediately:

• swelling of your lips, mouth, tongue, or throat, difficulty breathing or swallowing as this could indicate a severe allergic reaction
• sudden, severe stomach pain that spreads to your back as this could be a sign of acute pancreatitis
• sudden, severe stomach pain, yellowing of the skin and/or eyes, high temperature, or severe vomiting, which could indicate a gallbladder issue
• severe dehydration, confusion, extreme drowsiness, fainting, rapid breathing, or passing little to no urine
• low blood sugar levels, unconsciousness, seizures, or inability to respond normally could be a sign of hypoglycaemia

Contact your doctor or NHS 111 if you:

• keep vomiting or cannot keep fluids down
• develop signs of serious dehydration, such as very dark urine, urinating much less than usual, a fast heartbeat or dizziness that does not improve when you stand up
• your skin or the whites of your eyes turn yellow, or you develop dark urine or pale stools, as these may indicate a gallbladder or liver problem
• notice a new lump or swelling in your neck, persistent hoarseness or difficulty swallowing, however, these symptoms have several possible causes and do not necessarily mean they were caused by Foundayo
• repeatedly experience low blood sugar while taking insulin or a sulfonylurea, symptoms can include sweating, shaking, hunger, dizziness, confusion, blurred vision or a fast heartbeat
• sudden vision changes or loss, which could indicate an underlying diabetic eye disease

If you get any side effects, including any that aren’t listed, that are concerning, getting worse, or are difficult to manage, speak to your doctor.

Foundayo, Wegovy, and Mounjaro share similar side effects. They all commonly cause digestive symptoms, especially at the start of treatment and after a dose increase. However, Mounjaro works slightly differently because it binds to 2 receptors, GLP-1 and GIP, whereas Foundayo and Wegovy only activate GLP-1 receptors.

A key difference between GLP-1 weight loss injections and pills is that tablets do not cause injection-site reactions, such as pain, discomfort, redness, or swelling at the injection site. This can make weight loss pills a more suitable option if you have experienced these effects with Mounjaro or Wegovy.

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