Lactulose for constipation?

Lactulose is a common osmotic laxative used for constipation. It isn’t absorbed in the small intestine; it works by drawing water into the stool and softening it, which can help you have a bowel movement within 1–3 days. It’s also used in people with liver disease to lower blood ammonia.

Key points about dosing (general guidance; follow your product label or your clinician):
- Adults: starting dose is typically 15–30 mL once daily (or 15 mL twice daily). If needed, the dose can be gradually increased to help achieve a soft stool, often up to about 60 mL per day in divided doses.
- Children: dosing is age/weight based and should be given under medical supervision. Start with the smallest effective dose and adjust as advised by a pediatrician or the product label.
- Onset: relief usually within 1–3 days; some people may take longer.

Common side effects:
- Gas, bloating, cramping, and diarrhea. If diarrhea is severe or you become dehydrated or feel lightheaded, stop and contact a clinician.
- Long-term use can affect electrolyte balance in some people; discuss with a doctor if you need ongoing treatment.

Important cautions:
- Do not use if you have a suspected bowel obstruction or certain rare conditions.
- People with galactosemia should avoid lactulose.
- It may affect blood sugar slightly due to its sugar content; diabetics should monitor as advised by their clinician.
- If you’re pregnant or breastfeeding, talk to a healthcare provider first.
- If you’re taking other medicines, check with a pharmacist or doctor about timing (lactulose can interact with other drugs if you have diarrhea or are on multiple medications).

If you’d like, tell me your age (and if it’s for yourself or someone else), any medical conditions, and what country you’re in. I can tailor dosing guidance to your situation and point you to the exact product labeling.