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A 43-year-old member asked:

how long do i have to take metformin?

2 doctor answers4 doctors weighed in
Dr. David Sneid
Endocrinology 41 years experience
Possibly life long: It depends on why you're taking it. For most things, like diabetes, you take it as long as it gives you some benefit without excessive adverse events.
Dr. Thomas Namey
Rheumatology 48 years experience
Till: the problems that caused you to be given this are resolved, but many people remain on it for decades!

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A 33-year-old member asked:

Please tell me how long it takes for metformin to work?

1 doctor answer1 doctor weighed in
Dr. Philip Kern
Endocrinology 43 years experience
A few days: You should start to see improvement in your blood sugars within a few days, and continued improvement over a few weeks.
A 25-year-old female asked:

How long does it take to for side effects to stop after discontinuing metformin?

1 doctor answer1 doctor weighed in
Dr. David Sneid
Endocrinology 41 years experience
Days: If they're due to metformin, they will stop within sever days. If they continue, they're due to something else.
A 31-year-old member asked:

How long does it take metformin to get in your system?

1 doctor answer1 doctor weighed in
Dr. Philip Kern
Endocrinology 43 years experience
Soon: For lowering blood glucose, you will start to see the effects of metformin in a few days to a week. For pcos, it may take longer (several months) to see a normalization of periods, fertility, etc.
A 33-year-old member asked:

How long does it take to get metformin out of your system?

1 doctor answer1 doctor weighed in
Dr. Stanley Schwartz
Endocrinology 52 years experience
24-48 hours: Maybe a bit longer if have kidney dysfunction.
Valley, Alabama
A 28-year-old male asked:

How long does it take the drug metformin to expire?

1 doctor answer3 doctors weighed in
Dr. Tony Trpkovski
Internal Medicine 28 years experience
Expiration: Most drugs expiration date is a year. Some drugs less. There have been studies that looked at the efficacy of drugs post expiration and some were still effective as many as 20 years out. Best is to see your doc and see what's best for you. :)

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Last updated Mar 16, 2021

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