Senna leaf (Cassia senna)
What it is
An FDA-approved over-the-counter stimulant laxative that works within 6 to 12 hours. Effective for acute constipation but not recommended for long-term use. Chronic use can lead to dependency where the bowel stops functioning normally without it and can cause dangerous electrolyte imbalances, particularly low potassium. Maximum recommended duration is 1 to 2 weeks. Use osmotic laxatives or fibre for chronic constipation instead.
Dose
15–30 mg sennosides at bedtime; maximum 1–2 weeks; chronic use causes dependency and electrolyte loss
Time of day & tips
Take at bedtime with a full glass of water — works in 6–12 hours. Use only for acute constipation (1–2 weeks max). Eat potassium-rich foods if using repeatedly.
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