Dr. Benjamin H. Krasne, M.D.
Board-certified physicianBoard-certified in anesthesiology, he reads medications and metabolism with a pharmacologist's eye, which shapes how he doses weight loss and longevity care.
Proven blood sugar tablet, prescribed online
Metformin online for blood sugar and insulin resistance
Metformin is an inexpensive, long-established tablet that lowers blood sugar and helps the body use insulin. A licensed clinician can decide in a short call whether it suits your blood sugar or weight goals.
- Free 5–10 minute consultation
- Inexpensive at $50 a month
- Kidney labs reviewed before prescribing
Free to book. You pay only if you go ahead with treatment.
$50per month
Licensed U.S. clinician review
Form: Oral tablet
$50/motransparent price
5–10 minphone or video
No insuranceneeded
LicensedU.S. clinicians
Why get metformin through My IV Doctors
Kidney safety checked
Your clinician reviews recent kidney function results, since the FDA bases metformin use on eGFR, before writing a prescription.
IR or ER, your choice
You and your clinician decide between immediate-release and extended-release tablets, which can make a real difference for stomach side effects.
Slow, steady dosing
You start low and increase no more often than every one to two weeks, which helps most people tolerate metformin well.
What to expect, honestly
Your clinician explains what metformin can do for blood sugar and insulin resistance and why it is not an FDA-approved weight loss drug.
How to get metformin online
- 1
Pick a time for your free visit
Choose a phone or video consultation. You do not need insurance.
- 2
Talk with a clinician
In 5–10 minutes, a licensed U.S. clinician asks about your blood sugar results, kidney health, alcohol use, other conditions and medicines.
- 3
Get labs if needed
Your clinician may ask for a recent A1C and kidney function result, or order them, before prescribing.
- 4
Start metformin at a low dose
If metformin is appropriate, you begin at a low dose with meals and increase slowly to limit stomach upset.
- 5
Check in and adjust
Follow-up visits look at side effects, blood sugar and whether to change the dose or form.
Who metformin is for
Type 2 diabetes
Metformin is often the first medicine used, alone or combined with others including insulin.
Prediabetes with higher risk
Your clinician may consider it off-label if your blood sugar is in the prediabetes range and you have other risk factors.
Insulin resistance or PCOS
Some people with signs of insulin resistance or polycystic ovary syndrome are prescribed metformin off-label as part of a wider plan.
Part of a weight plan
It can be used with diet and activity changes, or sometimes with other medicines, when blood sugar is part of the picture.
Who shouldn't take metformin
People with an eGFR below 30, metabolic acidosis such as diabetic ketoacidosis or an allergy to metformin. Heavy alcohol use and serious liver or heart disease also need careful review.
Metformin vs. GLP-1 medicines
| Feature | Metformin | GLP-1 medicines |
|---|---|---|
| Form | Tablet or liquid | Injection or tablet, by product |
| Approved to manage weight | No | Some, such as Wegovy and Zepbound |
| Effect on weight | Small for some people | Much larger |
| Cost | $50/mo | Higher |
| Track record | Used for decades | Newer |
Metformin, explained
Metformin is a tablet that has been used for decades as a first-line treatment for type 2 diabetes. It lowers blood sugar mainly by reducing how much glucose your liver releases, and it also improves how your body responds to insulin and reduces the glucose you absorb from food. It does not make your pancreas release extra insulin, so on its own it rarely causes low blood sugar.
Its FDA-approved use is type 2 diabetes. Clinicians also prescribe it off-label in some situations, such as prediabetes, insulin resistance and polycystic ovary syndrome. In the NIH-funded Diabetes Prevention Program, metformin lowered the rate of new type 2 diabetes in adults at high risk compared with placebo, although an intensive lifestyle program worked better.
Metformin is not an FDA-approved weight-loss drug. Some people lose a small amount of weight on it, but it is much less powerful for weight than GLP-1 medicines. A licensed U.S. clinician at My IV Doctors will be clear about what it can and cannot do for you before prescribing.
Metformin ER vs. IR and how to take it
Metformin comes as regular (immediate-release) tablets, extended-release tablets and a liquid. Regular tablets are usually taken two or three times a day with meals. Extended-release tablets are usually taken once a day with the evening meal and must be swallowed whole, not split, crushed or chewed.
Your clinician typically starts with a low dose and raises it no more often than every one to two weeks. Taking it with food and switching to extended-release are the two most common ways to reduce stomach side effects.
Metformin and kidney function, scans and surgery
The FDA bases metformin use on kidney function measured as eGFR. It should not be used when eGFR is below 30, and starting it is not recommended when eGFR is between 30 and 45. That is why your clinician checks recent kidney results.
Tell every provider you take metformin before surgery, including dental surgery, or any X-ray or scan that uses injected contrast dye. You may need to pause it and wait at least 48 hours before restarting, as your doctor directs.
Metformin vs. GLP-1 medicines
GLP-1 medicines such as semaglutide and tirzepatide have much larger effects on weight and are approved for weight management. Metformin is far cheaper, taken by mouth and well understood, which is why it remains a common first step for blood sugar. Some people take both; your clinician can explain whether that makes sense for you.
Metformin side effects and safety
Most people tolerate metformin well once the dose is built up slowly. One rare complication is serious, so know the warning signs.
- Common: diarrhea, nausea, stomach discomfort, gas, indigestion and a change in taste
- Lactic acidosis is rare but can be life-threatening; risk is higher with kidney disease, age over 65, heavy alcohol use, liver or heart disease or severe dehydration
- Stop and get urgent care for extreme tiredness, muscle pain, fast or deep breathing, stomach pain with vomiting or feeling unusually cold
- Long-term use can lower vitamin B12; tell your clinician if you have had low B12
- Low blood sugar is more likely if combined with insulin or a sulfonylurea
- Pause around contrast scans and surgery as directed
Physicians who oversee your care
Independently licensed U.S. physicians supervise every treatment we offer.
Dr. Johnathan Chance Miller, M.D.
PhysicianTrained at Columbia and Washington University, he pairs prescriptions with practical habits around food, training and sleep.
Dr. Vanessa Niles, R.N., M.D., F.A.C.O.G.
OB-GYN, board certifiedAn OB-GYN for more than 40 years and a Fellow of ACOG, she leads women's health care, from perimenopause to PCOS.
Metformin FAQs
Still deciding? The first consultation is free and takes about 5–10 minutes.
Book a free consultationCan I get metformin online for weight loss?
Metformin is not FDA-approved for weight loss, and its effect on weight is usually small. A clinician may prescribe it off-label when blood sugar or insulin resistance is part of your situation, and will explain other options if weight is your main goal.
How much does metformin cost without insurance?
The plan is $50/mo, and booking the first consultation is free. You do not need insurance.
Can metformin prevent diabetes in prediabetes?
It is not FDA-approved for prediabetes, but clinicians sometimes prescribe it off-label. In the Diabetes Prevention Program, it lowered the chance of developing type 2 diabetes, though lifestyle changes worked better.
Metformin ER vs. regular: which is better?
Both lower blood sugar. Extended-release is taken once a day and is often easier on the stomach, while regular tablets are taken with two or three meals a day.
How long does metformin take to work?
Blood sugar can begin to improve within weeks as the dose increases. A1C, which reflects about three months, is usually rechecked after that.
Does metformin cause low blood sugar?
On its own it rarely does. The risk rises when it is combined with insulin or sulfonylureas.
Can I drink alcohol on metformin?
Heavy or binge drinking increases the risk of lactic acidosis. Keep alcohol limited and tell your clinician how much you drink.
Do I need blood work to get metformin?
Yes, your clinician needs a recent kidney function result and usually an A1C or fasting glucose. They can order these if you do not have them.
How do I stop metformin stomach side effects?
Stomach symptoms are common at the start. Taking it with food, building the dose slowly and switching to extended-release usually help.
Is metformin safe with kidney disease?
It depends on how well your kidneys work. It should not be used if eGFR is below 30, and is not usually started between 30 and 45.
Do I need to stop metformin before a CT scan?
You may need to pause it around scans that use injected contrast dye. Follow the instructions of the doctor ordering the scan.
Can metformin lower vitamin B12?
Long-term use can reduce B12 levels in some people. Your clinician may suggest checking it periodically.
Can I take metformin with a GLP-1 medicine?
Yes, they are often combined in type 2 diabetes. Your clinician will check the combination is right for you.
Start metformin with a free consultation
Book a free 5–10 minute phone or video visit. If a licensed clinician decides metformin suits your blood sugar goals, treatment costs $50 a month with follow-up.
Related treatments
References
- MedlinePlus: Metformin
- FDA: Revised warnings on metformin use with reduced kidney function
- NIDDK Central Repository: Diabetes Prevention Program
Medically reviewed October 2026. This page is general information and not a substitute for advice from your own clinician. Read our editorial policy.
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