GLP-1 side effects: beating the nausea, Lagos edition.

Why these medicines make you feel sick

Semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) work partly by slowing how fast your stomach empties. Food sits longer, you feel full sooner, and you naturally eat less. That is the point. But a stomach that empties slowly also means:

• A normal-sized Nigerian plate now feels like a double portion
• Oily or heavy food sits like a stone
• Reflux, burping and a "sick" feeling if you eat past full

Your body adapts. The nausea you feel in week one is not what you will feel in week six — as long as the dose goes up at the right pace and you change how you eat.

What is normal, and when

Vomiting happens to a minority and is almost always linked to eating too much, too fast, or too greasy. Diarrhoea is more common on tirzepatide in the first weeks; constipation is more common on semaglutide. Both tend to settle.

What to eat: a Nigerian plate on a GLP-1

The rule is small, plain, protein first, stop early. Applied to what is actually in a Lagos kitchen:

Eat more of

• Grilled or boiled fish, chicken, turkey, eggs — protein keeps muscle while you lose fat and calms nausea
• Pepper soup with lean meat or fish (light on the oil, moderate on the pepper)
• Moi moi, beans (small portions, well cooked), akara baked not deep-fried
• Boiled yam, plantain, sweet potato in modest amounts
• Ofada or brown rice, oats, pap/ogi without too much sugar
• Vegetables — ugu, efo, okra, cucumber, garden egg — and fruit like pawpaw, watermelon and oranges
• Plain yoghurt, ginger tea, warm water with lemon

Eat less of (especially in the first month)

• Fried rice, jollof made with a lot of oil, deep-fried anything — fat is the single biggest nausea trigger
• Large swallows: a full wrap of eba, fufu or pounded yam will sit for hours. Half or a third is plenty.
• Very spicy, very peppery stews when you are already queasy
• Fizzy drinks, malt, sugary juices — bloating and sugar spikes
• Shawarma, suya with the fat on, puff-puff, meat pie at 11pm

How to eat

1. Protein first, then vegetables, then starch — in that order.
2. Use a side plate. Seriously. The portion that used to feel normal is now too much.
3. Chew slowly and stop at the first sign of fullness. "I can still fit more" is a trap that ends in vomiting.
4. Do not lie down for 2 hours after eating. Reflux is worse on these medicines.
5. On injection day and the day after, keep meals extra light.

Fluids: the part people skip

Nausea, vomiting and eating less all drain fluid, and dehydration is the most common reason GLP-1 users end up at the hospital with kidney strain. Aim for about 2–2.5 litres a day — more in the heat. Water, zobo without sugar, diluted oral rehydration salts, coconut water, clear soups. Sip through the day rather than gulping a bottle, which triggers fullness and nausea.

If you cannot keep fluids down for a day, that is a call-the-clinic situation, not a wait-and-see one.

Constipation: the under-reported one

Slower gut, less food, less fluid — constipation is almost guaranteed if you do nothing. Prevent it:

• Fibre every day: beans, oats, vegetables, fruit with skin, chia or flax if you have them
• Fluids, as above
• Walk 20–30 minutes daily
• Magnesium citrate or a gentle osmotic laxative (such as lactulose or polyethylene glycol) if you go more than 3 days — ask your clinician which
• Do not rely on stimulant laxatives ("bisacodyl every night") for weeks on end

Nausea toolkit

• Ginger — tea, chewed fresh, or ginger sweets. Cheap and genuinely effective.
• Small cold foods — cold foods smell less, and smell drives nausea
• Peppermint tea after meals
• Do not skip meals to avoid nausea — an empty stomach makes it worse. Have a few crackers or a boiled egg.
• Anti-nausea medicine — ondansetron, prescribed for the first days after a dose increase, is reasonable and we offer it as a quick injection in clinic for clients on our programs
• Slow the dose — if the current step is making you miserable, say so. Staying on a dose for 6–8 weeks instead of 4 is a normal, sensible decision and it does not "waste" the program.

Other things people notice

• Tiredness in month one, from eating less. Protein, salt in moderation, fluids and sleep fix most of it.
• Sulphur-smelling burps, more on semaglutide. Smaller meals and less egg/beans on injection day help.
• Dizziness on standing — usually fluid. Sometimes low blood sugar if you are also on diabetes medicines; tell your clinic.
• "Ozempic face" — looser skin on the face from fast weight loss, not a drug side effect. Losing at a steady pace, keeping protein up and resistance training reduces it; facial treatments can help later.
• Muscle loss — any fast weight loss costs some muscle. Protein (about 1.2–1.6 g per kg of body weight per day) and two or three strength sessions a week protect it.
• Mood changes — uncommon, but tell someone if you feel low or anxious in a way that is new.

Warning signs — do not wait

Call your clinic or go to the nearest hospital for:

• Severe, persistent stomach pain, especially spreading to the back, with or without vomiting (possible pancreatitis)
• Vomiting that stops you keeping fluids down for 24 hours
• Pain in the upper right of the abdomen, fever, or yellowing of the eyes (gallbladder)
• Very little urine, extreme thirst, confusion (dehydration / kidney strain)
• Shakiness, sweating, confusion if you also take insulin or sulfonylureas (low blood sugar)
• Swelling of the face, lips or throat, or difficulty breathing (allergic reaction)
• Any sudden vision change if you have diabetes

How we manage this at The Baddie Lab

Side effects are not a sign the medicine is "working" or "not working" — they are a sign of how your stomach is adapting. On our programs, every dose increase is a check-in, not an automatic step, and we would rather hold you at a comfortable dose than push you into quitting. Anti-nausea injections and IV hydration are available in clinic for the rough days. If you are starting out, read how to take the shot properly first, and see our GLP-1 weight loss page for how the programs are built.