U.S. doctors online nowAsk doctors free
A 48-year-old member asked:

How fast milk of magnesia (magnesium hydroxide) work?

1 doctor answer2 doctors weighed in
Dr. Yash Khanna
Family Medicine 58 years experience
1/2 HOUR TO 6 HOURS: It may work as an antacid within 30 minutes and as a laxative it may take 6 hours to 12 hours.
Dr. Raymond Chow
Pharmacology 9 years experience
Check with the dosing on the product label, since generally lower doses are used for acid reduction (1-3 TEAspoons), and higher to move the bowels (1-3 TABLEspoons).
Nov 26, 2013

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

Similar questions

A 30-year-old member asked:

Is milk of magnesia (magnesium hydroxide) habit forming?

1 doctor answer1 doctor weighed in
Dr. Yash Khanna
Family Medicine 58 years experience
No it is not: No it is not habit forming but some people tend to use it over long period of time to help move bowels.
A 35-year-old member asked:

How long should I give milk of magnesia (magnesium hydroxide) to work?

2 doctor answers5 doctors weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
Milk of magnesia (magnesium hydroxide): Milk of Magnesia (magnesium hydroxide) usually takes effect (leads to a bowel movement ) in half an hour to six hours – but this is variable.
A 43-year-old member asked:

How much time does it take for milk of magnesia (magnesium hydroxide) to work?

1 doctor answer3 doctors weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
Milk of magnesia (magnesium hydroxide): Milk of Magnesia (magnesium hydroxide) usually takes effect (leads to a bowel movement ) in half an hour to six hours – but this is variable.
A male asked:

Will milk of magnesia (magnesium hydroxide) still work even if expired?

1 doctor answer2 doctors weighed in
Dr. Frank Kuitems
Internal Medicine 37 years experience
Yes: yes as long as it did not get much hotter than room temperature
A 42-year-old member asked:

Milk of magnesia (magnesium hydroxide) problem; sometimes it works, sometimes it doesn't. Why?

1 doctor answer2 doctors weighed in
Dr. Vivek Huilgol
Gastroenterology 36 years experience
Amount taken: The amount taken plus the amount of fluid consumed plus your varying diet plus activity all have an impact. Feel free to vary the dose up and down as needed and make sure you drink enough water.
Last updated Aug 5, 2018

People also asked

Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.