GLP-1 side effects, symptom by symptom

What the FDA-approved semaglutide and tirzepatide labels list, how long each symptom usually lasts, what tends to help, and the signs that mean you should contact a clinician rather than wait it out.

13 articles · GLP-1 side effects: what is common and what to do

GLP-1 side effects: what is common and what to do

The side effects people most often report on GLP-1 medications, why they tend to appear early, and when to contact your care team.

May 27, 2026 · 6 min read

Tirzepatide side effects: what the label lists

The side effects on the FDA-approved tirzepatide labels, why they cluster around dose increases, the serious warnings, the birth-control note, and when to call.

September 26, 2026 · 8 min read

Semaglutide side effects: what the label lists

The side effects on the FDA-approved semaglutide labels, why they cluster early, sulfur burps and nausea, the serious warnings, and when to call.

September 26, 2026 · 8 min read

Semaglutide nausea: how long it lasts and what helps

Nausea is the most commonly reported GLP-1 side effect. Why it clusters early and after dose increases, what reliably helps, and when it stops being normal.

October 2, 2026 · 7 min read

Constipation on a GLP-1: causes and relief

Constipation is on both the semaglutide and tirzepatide labels, and it has three causes working together. What helps, and when it needs attention.

October 2, 2026 · 6 min read

Sulfur burps on GLP-1 medications

Burping is a listed side effect, and some people describe theirs as smelling of sulfur. Why slower digestion causes it, and what reduces it.

October 2, 2026 · 5 min read

Heartburn and acid reflux on a GLP-1

Heartburn and indigestion appear on the approved labels. Why delayed stomach emptying causes reflux, what helps, and the symptom that needs urgent attention.

October 2, 2026 · 6 min read

Fatigue on a GLP-1: why you feel tired

Fatigue is on the approved labels, and eating far less is usually the bigger part of the story. What to check, what helps, and what tiredness can signal.

October 2, 2026 · 6 min read

GLP-1 hair loss: the medication or the weight loss?

Hair loss appears on one approved label and is strongly associated with rapid weight change generally. What the likely mechanism is, and what helps.

October 2, 2026 · 6 min read

GLP-1 muscle loss: how much is normal?

Losing weight means losing some lean mass, and a suppressed appetite makes it easier to lose more than you want. What protects muscle, and why it matters.

October 2, 2026 · 7 min read

Injection site reactions: redness, itching and lumps

Mild redness, itching or a small lump at the injection site is listed on the labels and usually settles. What helps, and which reactions need urgent attention.

October 2, 2026 · 5 min read

How long do GLP-1 side effects last? A week-by-week view

Most GLP-1 side effects follow a pattern tied to dose increases rather than to calendar time. What that pattern looks like and when to stop waiting it out.

October 2, 2026 · 6 min read

GLP-1 red flags: when to call a clinician or 911

The symptoms on the approved labels' warnings sections that should not be waited out, what they can indicate, and which number to call.

October 2, 2026 · 7 min read

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