Laxatives relieve constipation by stimulating the bowel, drawing water into the intestine, or adding bulk to stool — different classes suit different symptoms and onset needs.
📊 Key statistics:
Approximately 16% of adults globally have chronic constipation, rising to 33% in older adults
Bisacodyl works within 6–12 hours orally, 15–60 minutes as a suppository
Adequate hydration and dietary fibre reduce reliance on laxatives
💊 Laxatives at Intimo Life:
Stimulant — Bisacodyl and Senna stimulate bowel contractions for fast relief
Osmotic — Milk of Magnesia and Lactulose draw water into the intestine; softer onset
⚠️ For short-term use only. Do not use with suspected bowel obstruction, unexplained abdominal pain, or appendicitis symptoms. Consult a pharmacist before use.
Medically reviewed by
ทีมเนื้อหา Intimo Life | Supatcheree A., Pharmacist
Irregular bowel rhythm — alternating constipation and diarrhea over time
Bulk-forming laxatives and Lactulose carry much lower dependence risk. If you need a laxative more than once a week, consult a pharmacist to address the underlying cause.
What are laxative side effects? When must laxatives not be used?
Key side effects and contraindications:
Common — cramping, bloating, nausea, diarrhea with excess doses
Bisacodyl — severe cramping if crushed or taken with milk
Milk of Magnesia — avoid in kidney disease; magnesium may accumulate
Never use laxatives with:
Suspected bowel obstruction — pain, vomiting, no stool or gas
Unexplained acute abdominal pain or possible appendicitis
Severe dehydration
Blood in stool or no improvement after 3–5 days — see a doctor.
Generic vs brand laxatives — what is the difference? How does Dulcolax compare to generic options?
Brand vs generic — same active ingredient:
Dulcolax — most recognised brand; Bisacodyl 5 mg in tablets and suppositories
Generic Bisacodyl — authority-approved; more affordable with equivalent effectiveness
Senna — tablets, tea, or syrup; choose certified products
Milk of Magnesia — generic and branded; different mechanism from Bisacodyl/Senna
Choose based on budget. Consult a pharmacist for the right formulation.
Laxatives suit short-term constipation from diet changes, travel, or medication side effects. See a doctor if constipation persists more than 3 weeks, or if you notice blood in stool, weight loss, or severe abdominal pain — these may signal conditions that need proper diagnosis.
Laxatives in children require careful use. Bisacodyl is not recommended for children under 6 years without a doctor's guidance. For young children, Lactulose is generally a safer option under pharmacist or paediatrician supervision. Always try increasing fluid intake, dietary fibre, and physical activity before considering a laxative for a child.
Psyllium and Lactulose are considered safer in pregnancy — minimally absorbed. Use Bisacodyl or Senna only after consulting a doctor, especially in the first trimester. Constipation in pregnancy is common from hormonal changes and iron supplements — increase water and fibre first.
Daily stimulant laxative use is not recommended. Continuous use beyond one week risks lazy bowel syndrome and electrolyte imbalance from frequent defecation. If you find yourself needing a laxative more than once or twice a week, this signals the need to investigate and address the root cause of constipation rather than relying on medication alone. Consult a pharmacist to plan appropriate long-term management.
Laxatives should not be used for weight loss. They do not reduce body fat — they only cause temporary loss of water and electrolytes. Any weight lost returns once the body rehydrates. Using laxatives repeatedly for weight control risks dehydration, dangerous electrolyte imbalance, and long-term bowel dysfunction. For safe, sustainable weight management, consult a nutrition specialist or doctor.
Cramping after stimulant laxatives is common — caused by increased bowel contractions. For mild cramping, rest and apply a warm compress. Stop the laxative and consult a pharmacist if cramping is severe, vomiting occurs, or no bowel movement within 12 hours. Cramping worsens if Bisacodyl is crushed or taken with milk — both damage the Enteric coating.
Adequate water intake is the first step when constipation occurs — water softens stool and makes it easier to move through the intestine. Combined with a high-fibre diet and regular physical activity, increasing fluids can relieve acute constipation in many cases without needing a laxative. Laxatives should be used only when lifestyle adjustments are insufficient, not as the first response to constipation.
Laxatives are available online at Intimo Life — consult our pharmacist via LINE before ordering to get a personalised recommendation for the right laxative type. Generic laxatives such as Bisacodyl are affordable and accessible; branded products cost more but contain the same active ingredient. Orders are dispatched quickly in plain packaging with no product names on the outside, ensuring complete privacy.
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Senolax (Senna Laxative Tablet) 60 Tablets
