Metformin ER is a generic prescription drug used together with diet and exercise to improve blood sugar control in adults with Type 2 diabetes mellitus. Metformin is not insulin, and it is taken by mouth. It is a first-line treatment option for Type 2 diabetes mellitus. This may be the first treatment option your prescriber chooses for your Type 2 diabetes, and fortunately, it is cost-effective for most people. You can pay as much as $61.19 for Metformin ER, but with a Metformin ER coupon from SingleCare, your Metformin ER price can be reduced to just $4.00 for 90, 500mg tablet extended release 24 hours.
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SingleCare’s prescription prices are based on multiple sources. The prices we publish are our best estimate, but we cannot guarantee that the price we display will exactly match the price you receive at the pharmacy. For an exact price, please contact your pharmacy and provide the BIN/GRP/PCN numbers shown on your SingleCare card.
Any SingleCare bonus savings, including the $3 signup bonus, may only be used once.
Prices updated: 12/05/2025
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Metformin ER is a generic prescription drug used together with diet and exercise to improve blood sugar control in adults with Type 2 diabetes mellitus. Metformin is not insulin, and it is taken by mouth. It is a first-line treatment option for Type 2 diabetes mellitus. This may be the first treatment option your prescriber chooses for your Type 2 diabetes, and fortunately, it is cost-effective for most people. You can pay as much as $61.19 for Metformin ER, but with a Metformin ER coupon from SingleCare, your Metformin ER price can be reduced to just $4.00 for 90, 500mg tablet extended release 24 hours.
Our price history metrics are calculated from aggregate prescription data that we receive from all participating pharmacies. This chart updates daily to show new price fluctuations. If a data point is missing from the chart, it is because we do not have enough data to produce a reliable figure.
| Pharmacy | Metformin Hcl Er Retail Price | Metformin Hcl Er SingleCare Price |
|---|---|---|
| CVS Pharmacy | $36.90 | $19.80 |
| Walmart | $10.44 | $7.20 |
| Walgreens | $22.99 | $22.01 |
| Kroger Pharmacy | $37.61 | $7.41 |
| Albertsons Pharmacy | $58.24 | $11.83 |
These prices are based on the last month of SingleCare prescription fill data by major pharmacy. This table updates daily to show the most accurate typical prices by pharmacies. If a data point is missing from the table, it is because we do not have enough data to produce a reliable figure.
Metformin ER is a generic prescription drug used together with diet and exercise to improve blood sugar control in adults with Type 2 diabetes mellitus. Metformin is not insulin, and it is taken by mouth. It is a first-line treatment option for Type 2 diabetes mellitus. This may be the first treatment option your prescriber chooses for your Type 2 diabetes, and fortunately, it is cost-effective for most people. You can pay as much as $61.19 for Metformin ER, but with a Metformin ER coupon from SingleCare, your Metformin ER price can be reduced to just $4.00 for 90, 500mg tablet extended release 24 hours.
The retail price of Metformin ER without insurance coverage is $61.19, but you can use a free SingleCare card and pay as low as $4.00 for 90, 500mg tablet extended release 24 hours.
Metformin ER is covered by nearly all health insurance plans without restrictions. The copay costs should be low, but it depends on the insurance plan’s formulary. With a SingleCare Metformin ER coupon without insurance, you could pay as little as $4.00 for 90, 500mg tablet extended release 24 hours. This could be cheaper than using insurance.
Metformin ER is covered by nearly all Medicare Part D and Medicare Advantage drug plans without restrictions. The copay cost should be low, but this may vary between plans. SingleCare may be a more affordable option than Medicare, so take your SingleCare prescription discount card to a local participating pharmacy and pay only $4.00 for 90, 500mg tablet extended release 24 hours.
Metformin ER is covered by nearly all Medicaid plans. The copay cost should be low, but the out-of-pocket cost may vary by state. Sometimes, it may be worth using your SingleCare savings card instead of Medicaid. For Metformin ER, you could pay as little as $4.00 for 90, 500mg tablet extended release 24 hours.
The brand-name versions of Metformin ER, Glucophage XR, Fortamet, and Glumetza, are no longer available in the United States. Each branded formulation has a unique release mechanism, and the generic versions align to the brand names. Your pharmacist will select your generic metformin based on how your prescriber writes the prescription order. The selection most likely will affect your cost, especially if you do not have insurance coverage. The generic for Glucophage XR is typically the most cost-effective because this formulation has the lowest cost.
The most reliable way to save money on Metformin ER is to use a free coupon from SingleCare at participating pharmacies. The lowest SingleCare price for Metformin ER is 4.00 for 90, 500mg tablet extended release 24 hours. For people who join SingleCare’s loyalty savings program, bonus savings on future drug purchases are earned just by using SingleCare discount coupons.
Other opportunities to save money on commonly-prescribed generic drugs like Metformin ER are limited. Typically, no manufacturer rebates, discount coupons, or patient assistance programs are available. Here are some alternative ways to reduce the out-of-pocket cost of Metformin ER.
Income-eligible patients should explore Medicaid or Medicare Low-Income Subsidy. This can help reduce the cost of common generic drugs.
Income-eligible patients can also enroll in drug savings programs at local 340B clinics or hospitals.
Even people with substantial income could save significantly by finding the lowest price for Metformin ER at local pharmacies.
Purchasing a 90-day supply of Metformin ER may reduce the cost per pill, but you may need a new prescription.
Pay special attention to the release formulation being dispensed. Ask your prescriber or pharmacist to ensure the prescription is written to allow the lowest cost product to be dispensed.
The cheapest alternative to Metformin ER is immediate-release metformin, but switching will only save a few dollars a month. Doctors consider metformin the first-line and most basic treatment for Type 2 diabetes, so they only use other drugs when metformin treatment is not sufficient to control blood glucose levels. You can ask the prescribing healthcare professional for medical advice about other FDA-approved Type 2 diabetes drugs, but they cost more than metformin. Over-the-counter medicines or supplements promoted as remedies for lowering blood sugar cannot effectively substitute for metformin.
Kristi C. Torres, Pharm.D., is a 2005 graduate of The University of Texas at Austin. Her professional background includes academic teaching roles, district-level management for a nationwide pharmacy chain, and clinic-based pharmacy management. Dr. Torres has a wide range of experience in pharmacy operations and has traveled to many states to open and convert clinic-based pharmacies for one of the largest healthcare systems in the nation.
Currently, she works for Tarrytown Expocare Pharmacy in Austin, Texas, serving the intellectual and developmental disability community. There, she leads the order entry team, overseeing orders from across the country.
Dr. Torres began working in pharmacy at the age of 16 in a small East Texas town. She currently resides in Round Rock, Texas, with her daughter and a Shih-Tzu puppy.
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Prescription savings vary by prescription and by pharmacy, and may reach up to 80% off cash price. This is a medical discount plan. This is NOT insurance. This program offers you the opportunity to locate providers of various types of medical services who will offer their services to you at discounted rates. The range of discounts for medical or ancillary services provided under the plan will vary depending on the type of provider and service received. You are fully responsible for paying for all health care services but will be entitled to receive a discount from those health care providers in accordance with the specific pre-negotiated discounted fee schedule. This program does not guarantee the quality of the services or procedures offered by the providers. Except for prescription drugs which you will pay directly to the pharmacy at the time of purchase, all other services received through a program provider will be charged to the credit card on file in your member account. The charge will include an administrative fee for use of the program. Towers Administrators LLC is the licensed discount medical plan organization with its administrative office located at 4510 Cox Road, Suite 111, Glen Allen, VA 23060. SingleCare Services, LLC is the marketer of the discount medical plan organization including its website, singlecare.com, with its corporate office located at 99 High Street, Suite 2800, Boston, MA 02110. For additional information, including an up-to-date list of providers, or assistance with any issue related to program membership, please contact member support any time at www.singlecare.com, or by calling toll-free 844-234-3057, 24 hours, 7 days a week (except major holidays). Pharmacy names, logos, brands, and other trademarks are the property of their respective owners.
Blog articles are not medical advice. They are intended for general informational purposes and are not meant to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. If you think you may have a medical emergency, immediately call your physician or dial 911.
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© 2025 SingleCare Administrators. All rights reserved