Can You Drink Coffee on Ozempic or Mounjaro? Tea and Matcha Too

Yes, you can drink coffee, tea and matcha on Ozempic, Wegovy, Mounjaro and Zepbound. The US labels for the injections don't restrict them, and caffeinated drinks count towards your fluids. What matters is the 30-minute rule if you take a GLP-1 tablet, how caffeine sits with your own side effects, staying under about 400 mg a day, and the sugar in coffee-shop drinks. Green tea and matcha are fine to drink, but they won't add to your weight loss, and green tea extract capsules are best avoided.

What the labels say

None of the US labels for Ozempic, Wegovy, Mounjaro or Zepbound mentions coffee, tea or caffeine. The one rule to know is for the tablets. The labels for the Wegovy tablet and for Ozempic and Rybelsus tablets say to take them on an empty stomach in the morning with up to 4 ounces (about 120 ml) of water, not with any other drink, and then to wait at least 30 minutes before eating, drinking anything else or taking other tablets. So your morning coffee waits half an hour. The newer orforglipron tablet (Foundayo) can be taken with or without food.

The 2025 joint advisory on nutrition with GLP-1 medicines doesn't single out coffee either. It suggests ginger or peppermint tea for nausea, enough fluids, and cutting back on sugar-sweetened drinks, which is where most coffee-shop drinks come in.

Coffee and your side effects

No study has looked at coffee in people on a GLP-1, so this comes from what's known about coffee in general. Most people can carry on as normal. Adjust only if coffee seems to make something worse.

• Nausea. The FDA lists nausea and an upset stomach among the signs of too much caffeine. If your morning coffee turns your stomach, try a smaller or weaker cup, have it with food, or switch to decaf for a while. See managing nausea on a GLP-1.
• Heartburn and reflux. Coffee is one of the usual triggers. In a 2026 review of 40 studies and over 122,000 people, reflux was a little more common in coffee drinkers (34.9% against 30.7%), a difference the authors called of unclear clinical importance. Cut back only if it's one of your triggers; see heartburn and acid reflux on a GLP-1.
• Constipation. Coffee gets the bowels moving. In one study, a cup of caffeinated coffee stirred up the colon as much as a 1,000 kcal meal, and 60% more than water. A morning coffee can help, alongside the fibre and fluids in constipation on a GLP-1.
• Diarrhea. The flip side: caffeine can make loose stools worse. If you have diarrhea, ease off for a few days; see diarrhea on a GLP-1.
• Coffee suddenly tastes wrong. Food aversions and changes in taste are reported on these medicines. Try it weaker, iced, or with more milk, or have a break from it. See no appetite and food aversions.

Does coffee count towards your fluids?

Yes. A 2004 report from the US National Academies concluded that caffeinated drinks can contribute as much to your daily water as non-caffeinated ones, and the NHS says water, lower-fat milk and lower-sugar drinks, including tea and coffee, all count. In a UK trial, 50 regular coffee drinkers were as well hydrated after three days of four cups a day as after the same amount of water.

That matters on a GLP-1. The labels warn that vomiting and diarrhea can lead to dehydration, and smaller meals mean less water from food. See electrolytes and hydration on a GLP-1.

How much caffeine is fine

There's no GLP-1-specific limit. For healthy adults, the European Food Safety Authority says up to 400 mg a day raises no safety concerns, with single doses up to 200 mg. The FDA cites the same 400 mg, about two to three 12 fl oz cups of coffee, and notes that people vary widely in how sensitive they are. If you're pregnant, the NHS says no more than 200 mg a day.

Drink	Caffeine	Source
Espresso (60 ml)	80 mg	EFSA
Filter coffee (200 ml)	90 mg	EFSA
Brewed coffee (12 fl oz)	113 to 247 mg	FDA
Instant coffee (1 cup)	100 mg	NHS
Black tea (220 ml)	50 mg	EFSA
Tea, black or green (1 cup)	75 mg	NHS
Green tea (12 fl oz)	37 mg	FDA
Decaf coffee (8 fl oz)	2 to 15 mg	FDA
Energy drink (250 ml can)	80 mg	EFSA, NHS
Starbucks US Pike Place, grande	315 mg	Starbucks
Starbucks US Caffè Latte, grande	150 mg	Starbucks
Starbucks US Matcha Latte, grande	65 mg	Starbucks

Coffee-shop filter coffee is the one to watch: a single US grande comes close to the daily 400 mg.

Can coffee, green tea or matcha help you lose weight?

Not in any way that matters next to your medicine.

• Coffee. In three large US cohort studies, each extra daily cup of unsweetened coffee, caffeinated or decaf, went with 0.12 kg less weight gain over four years, while each teaspoon of sugar added to it went with 0.09 kg more. That's an association over years, not a weight-loss tool. The useful part is the sugar.
• Green tea. A Cochrane review found that in six trials outside Japan, green tea made a weight difference of 0.04 kg, which the authors judged not clinically important, and it didn't help people keep weight off.
• Matcha. It's powdered green tea leaf. The only weight study, a small 12-week pilot without randomisation, found no difference in weight or body composition between people on a low-calorie diet with matcha and those on the diet alone.

You'll also see coffee, green tea and matcha sold online as "nature's Ozempic" because they may nudge your own GLP-1 hormone. Any such effect is tiny next to the medicine; foods that boost GLP-1 naturally explains why.

Green tea and matcha are fine. Extract capsules aren't worth it.

The European Food Safety Authority concluded in 2018 that the catechins in green tea drinks are generally safe, but that supplement doses of 800 mg or more of EGCG a day may be associated with initial signs of liver damage. The US NIH says no safety concerns have been reported for green tea as a drink, and that extract side effects include nausea, constipation and stomach discomfort, the same problems many people already have on a GLP-1. Matcha is a drink made from the whole tea leaf, not a concentrated capsule. Drink the tea, matcha included; skip the capsules.

Making your coffee work for you

• Use it for protein. A plain milky coffee adds protein you'd otherwise miss: a Starbucks US grande Caffè Latte has 13 g protein for 190 kcal, and the Sugar-Free Vanilla Protein Latte has 27 g for 230 kcal. Plant milks mostly don't: an Iced Brown Sugar Oatmilk Shaken Espresso has 2 g. See protein shakes on a GLP-1 if you'd rather blend your own.
• Order matcha lattes unsweetened. A grande Starbucks US Matcha Latte comes sweetened, with 220 kcal and 29 g of sugar for 11 g of protein. The Protein Matcha has 28 g of protein for 300 kcal. Made at home with milk and no syrup, it's an easy protein top-up.
• Watch the sugar in seasonal drinks. A grande Pumpkin Spice Latte has 390 kcal and 50 g of sugar, and a grande Caramel Frappuccino 380 kcal and 54 g. On a small appetite that's a lot of your day for very little protein.
• Stop caffeine well before bed. A review of 24 studies found caffeine cut sleep by an average of 45 minutes, and worked out that a standard coffee should be drunk at least 8.8 hours before bedtime. For most people that means none after early afternoon.
• Have tea and coffee between meals if iron is low. They reduce how much iron you absorb from food; see vitamins and supplements on a GLP-1.
• Good swaps. Decaf keeps the ritual without the caffeine. Ginger tea is the advisory's suggestion for nausea; peppermint tea helps some people too, but mint can make heartburn worse.

Cutting back on alcohol at the same time? See alcohol on a GLP-1.

General nutrition information, not medical advice. If you have a heart condition, high blood pressure, anxiety, or you're pregnant, ask your doctor what amount of caffeine is right for you.