Common Semaglutide Side Effects
Semaglutide — whether brand-name (Ozempic, Wegovy) or compounded — carries the same active ingredient and similar side effect profiles. Most side effects are gastrointestinal and tend to improve as your body adjusts.
Back to: Compounded Semaglutide Overview
Most Common Side Effects
- Nausea — the most frequently reported side effect, especially during dose titration
- Diarrhea — usually mild and temporary
- Vomiting — more common at higher doses
- Constipation — reported by some patients
- Abdominal pain — typically mild
- Headache — usually resolves within the first few weeks
- Fatigue — may occur during initial treatment
Less Common but Serious Side Effects
Contact your healthcare provider immediately if you experience:
- Signs of pancreatitis (severe abdominal pain that radiates to your back)
- Changes in vision
- Signs of kidney problems (decreased urination, swelling)
- Severe allergic reactions (rash, difficulty breathing, swelling)
- Gallbladder problems (pain in the upper right abdomen)
- Hypoglycemia (low blood sugar), especially if taking other diabetes medications
Managing Side Effects
Most gastrointestinal side effects can be managed with these strategies:
- Start low, go slow: Gradual dose titration helps your body adjust
- Eat smaller meals: Avoid large, heavy, or high-fat meals
- Stay hydrated: Drink plenty of water, especially if experiencing vomiting or diarrhea
- Time your doses: Some patients find taking semaglutide at bedtime reduces nausea
Compounded vs. Brand-Name Side Effects
The side effect profile for compounded semaglutide should be similar to brand-name versions since they contain the same active ingredient. However, compounded formulations are not individually tested by the FDA, so potency variations could affect side effects. Always use a pharmacy that conducts third-party testing.
Important FDA Warnings
The FDA has noted concerns about compounded GLP-1 products, including reports of adverse events related to dosing errors. Additionally, semaglutide sodium salt forms (used by some compounders) are not the same as semaglutide base and have not been proven safe or effective.
Always verify that your compounding pharmacy uses semaglutide base, not salt forms.
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