How long does constipation last?

Develops by week 2-3, persists at stable dose without mitigation; resolves with active management

Does Ozempic cause hair loss?

Not directly. Hair shedding (telogen effluvium) is reported by some patients ~3 months into rapid weight loss — typical of any rapid-weight-loss state, not unique to GLP-1.

What foods should you avoid on a GLP-1?

Avoid greasy, fried, and ultra-processed foods (worst nausea), high-sugar drinks (rapid reflux), and large portions of red meat or cruciferous vegetables (slow gastric emptying compounds GI side effects). Adequate protein + soluble fiber + hydration are the wins.

How long do GLP-1 side effects last?

Most GI side effects (nausea, constipation, reflux) peak in weeks 1-2 after each dose increase and resolve within 4 weeks. If you stay on a stable dose without further titration, side effects typically fade for ≥80% of patients by week 12.

Does Ozempic cause stomach paralysis (gastroparesis)?

GLP-1 medications delay gastric emptying as part of their mechanism — that is not stomach paralysis. True gastroparesis after GLP-1 use is rare and the absolute risk in pharmacovigilance data is small. Symptoms (severe nausea, vomiting, abdominal pain past week 8) warrant evaluation.

Side-effect deep dive

Constipation on GLP-1 medications

Common, manageable. Slower gut motility + reduced food/fiber intake creates predictable constipation. Mitigation: fiber 25-35g/day + 80oz fluids + magnesium oxide if needed.

Why it happens

GLP-1 slows gut motility throughout the GI tract, not just the stomach. Combined with reduced overall food intake (especially fiber) during weight loss, constipation is almost guaranteed without active mitigation.

How to manage it

1.Fiber 25-35g/day — psyllium husk (1-2 tsp), chia seeds (2 tbsp), cooked vegetables, beans
2.Hydration ≥80 oz/day — fiber without water makes constipation worse
3.Magnesium oxide 200-400 mg at bedtime — common OTC mitigation
4.Daily walking — physical activity stimulates motility
5.Limit dairy + cheese (constipating combo with slow motility)
6.For persistent symptoms: stool softener (docusate) or osmotic laxative (PEG)

When to call your prescriber

No bowel movement for ≥3 days + abdominal distension
Severe abdominal pain + obstipation (ileus possible)
Vomiting + constipation (obstruction concern)

Affected medications

Sources

STEP-1 secondary endpoints — NEJM, 2021

Common questions readers ask

Does Ozempic cause hair loss?: Not directly. Hair shedding (telogen effluvium) is reported by some patients ~3 months into rapid weight loss — typical of any rapid-weight-loss state, not unique to GLP-1.
What foods should you avoid on a GLP-1?: Avoid greasy, fried, and ultra-processed foods (worst nausea), high-sugar drinks (rapid reflux), and large portions of red meat or cruciferous vegetables (slow gastric emptying compounds GI side effects). Adequate protein + soluble fiber + hydration are the wins.
How long do GLP-1 side effects last?: Most GI side effects (nausea, constipation, reflux) peak in weeks 1-2 after each dose increase and resolve within 4 weeks. If you stay on a stable dose without further titration, side effects typically fade for ≥80% of patients by week 12.
Does Ozempic cause stomach paralysis (gastroparesis)?: GLP-1 medications delay gastric emptying as part of their mechanism — that is not stomach paralysis. True gastroparesis after GLP-1 use is rare and the absolute risk in pharmacovigilance data is small. Symptoms (severe nausea, vomiting, abdominal pain past week 8) warrant evaluation.

Editorial information based on FDA-label prevalence data + AERS pharmacovigilance + patient-reported outcome corpora. Not personal medical advice.