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GLP-1 · Updated 2026-05-15

GLP-1 side effects month-by-month: what to expect

Written byEditorial Team, HormonalHealth PortalReviewed byEditorial Medical Review, MD, NAMS-CMP· Updated May 15, 2026

Short answer: Month 1-2: nausea peaks (60-80% of users), then resolves. Month 3-6: GI mostly settles, weight loss accelerates. Month 6+: side effects rare; maintenance dose.

1 min read

Key takeaways

  • Nausea worst month 1-2, mostly resolves by month 3
  • Constipation can persist — fiber + hydration are key
  • Rare serious effects (pancreatitis, gallbladder) at any point — know red flags

Month 1

Starting dose (0.25mg semaglutide). Nausea in 60-80%. Loose stools alternating with constipation. Decreased appetite already noticeable. Don't increase dose if intolerable — pause or slow.

Months 2-3

Dose increases (0.5mg → 1mg). GI symptoms often peak here briefly before stabilizing. Weight loss begins to be visible. Most people commit or quit at this stage.

Months 4-6

Higher doses (1.7-2.4mg). GI mostly tolerated. Weight loss continues (~1-2 lbs/week typical). Some people reach maintenance dose.

Month 6+

Maintenance phase. Side effects rare. Discuss long-term continuation, dose holidays, or alternation with clinician.

SC
Reviewed by Editorial Medical ReviewBoard-certified OB/GYN · NAMS-certified · Updated 2026-05-15

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