Managing Constipation on GLP-1: A Practical Guide

Managing Constipation on GLP-1: A Practical Guide

2026-01-01 · 5 min read

While nausea gets most of the attention, constipation affects up to 24% of GLP-1 users — and it's often more persistent. Slowed gastric emptying means your entire digestive system slows down.

Why GLP-1 Causes Constipation

GLP-1 slows gastric motility throughout the gut. Combined with eating less (less bulk to move things along) and often inadequate hydration, constipation becomes common — especially during dose escalation.

Prevention Strategies

  • Water first: aim for 2–3 liters daily — the single most effective intervention
  • Fiber intake: 25–35g daily from vegetables, legumes, whole grains
  • Daily movement: even a 20-minute walk stimulates gut motility
  • Probiotics: some strains may help with GLP-1-related gut slowdown
  • Magnesium glycinate (300–400mg before bed): a gentle, effective option

Treatment When It Happens

  • Osmotic laxatives (polyethylene glycol/Miralax): gentle and effective
  • Stool softeners (docusate sodium): good for short-term use
  • Psyllium husk (Metamucil): adds bulk and draws water into stool
  • Avoid stimulant laxatives for regular use — dependency risk

When to See Your Doctor

If you haven't had a bowel movement in 3+ days or have abdominal pain, bloating, or nausea alongside constipation, contact your doctor. In rare cases, severe GLP-1-related constipation requires medical management.

Track your digestive health in ShotFlow's daily log. Noting water intake and bowel regularity helps identify patterns — like whether constipation correlates with lower water days or dose increases — so you can intervene earlier.

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