Does ibuprofen break a fast?

No, it has no meaningful calories. It can irritate an empty stomach, so taking it with food in your eating window is gentler.

Does Tylenol break a fast?

No. Acetaminophen tablets have essentially no calories and are usually fine on an empty stomach at the labeled dose.

Do cough syrups and chewable vitamins break a fast?

They can. Many syrups and chewables contain sugar or corn syrup, often 5 to 15 calories per dose. Check the label or ask for a sugar-free version.

Should I stop my medication to fast?

No. Never stop or move a prescribed medicine for a fast without talking to your doctor. Diabetes and blood pressure medicines especially may need a plan.

Does Medication Break a Fast? No

Reviewed by the FastTrack team · Updated June 2026

Short answer: No

Most medications do not break a fast. A tablet or capsule has almost no calories, so ibuprofen, Tylenol and most prescription pills will not end your fast. What matters more is whether your medicine should be taken with food, and syrups, chewables and gummies can contain sugar.

Calories	~0 kcal per pill
Breaks a weight-loss fast?	No
Breaks ketosis?	No
Breaks autophagy?	Unlikely
Insulin impact	None for most pills

Why pills do not count as food

Tablets and capsules contain milligrams of active drug and small amounts of fillers. That is far too little energy to change insulin or end the fasted state. Never skip or move a prescribed medicine to protect a fast: the fast can be adjusted around the medicine, and the reverse needs your doctor.

Medicines that need food or a doctor's input

Ibuprofen, naproxen, aspirin and some antibiotics or steroids are easier on the stomach with food; on an empty stomach they can cause pain or, over time, bleeding, so take them in your eating window when you can. Insulin and sulfonylureas can cause low blood sugar during a fast, and blood pressure pills or diuretics may need adjusting. Talk to your doctor or pharmacist before fasting if you take any of these.

How much is safe

Take your medicines at the times your doctor or the label gives. If a dose falls in your fast and the label says to take it with food, shift your eating window rather than the dose, after checking with your pharmacist.

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Frequently asked questions

Does ibuprofen break a fast?: No, it has no meaningful calories. It can irritate an empty stomach, so taking it with food in your eating window is gentler.
Does Tylenol break a fast?: No. Acetaminophen tablets have essentially no calories and are usually fine on an empty stomach at the labeled dose.
Do cough syrups and chewable vitamins break a fast?: They can. Many syrups and chewables contain sugar or corn syrup, often 5 to 15 calories per dose. Check the label or ask for a sugar-free version.
Should I stop my medication to fast?: No. Never stop or move a prescribed medicine for a fast without talking to your doctor. Diabetes and blood pressure medicines especially may need a plan.