Before comparing metformin prices, check whether your prescription says regular tablets or extended release. ER or XR wording matters even when the strength is the same. Choose the exact version shown on your label.
Match your prescription before comparing
The strengths below describe immediate-release tablets. Extended-release metformin has separate product listings. Do not use an immediate-release quote to estimate an extended-release prescription, and do not switch versions to match a price.
- Form covered in this guide
- Immediate-release tablets
- Listed strengths
- 500, 850, 1000 mg
Search example, not a dose recommendation
Metformin 500 mg · 60 tablets
Choose the matching product from the search suggestions, enter the actual quantity and days supply on your prescription and your pharmacy ZIP code, then compare the results. Update the example details to match your own prescription.
Is a quantity of 60 the same as a 60-day supply?
Not necessarily. Quantity counts tablets; days supply depends on the directions in your prescription. Enter the number of tablets the pharmacy will dispense. Ask the pharmacist to verify the quantity and days supply if your online estimate and pharmacy quote differ.
Two pricing options. Use the card linked to your price.
RxNow checks its available pricing connections for BIN 019330 and BIN 610272. The search displays the lower returned price for each matched pharmacy when both options are available. One network can cost less for one prescription and more for another.
Select the card attached to your chosen pharmacy result. Its BIN, PCN and Group must stay together. The pharmacy confirms the final price when it processes the prescription. Search results are estimates, not a guarantee of price, stock or acceptance.
Free to use. No patient enrollment. No mail order. RxNow does not ask for your name or date of birth to search prices or download a card. A valid prescription is required; your pharmacy handles its normal patient information.
RxNow is a prescription discount program, not insurance. Ask the pharmacy to compare the RxNow price with your insurance copay or other available price; they cannot be combined on the same prescription purchase.
About this guide and sources
Prepared by RxNow. Product names, forms and listed strengths checked against the linked DailyMed labels on September 27, 2026. This guide explains price comparison and is not medical advice or a complete drug safety guide. Ask your pharmacist or prescriber about treatment, dose or substitution.
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