Metformin Dosage Guide — Strengths, Titration & Max Dose
Complete dosing reference for Metformin (Metformin Hydrochloride): available forms and strengths, typical adult dose, titration schedule, max dose, and dosing in special populations.
Verified pharmacies compete for your prescription. Free · No account · Bids in 1–4 hrs.
Chain retail
$45/mo
GoodRx typical
~$27/mo
Via Script Unlock
$14/mo
Save up to 70% — ~$372/year for chronic use.
Available Forms & Strengths
Forms
- Oral tablet
- Oral extended-release tablet
- Oral solution
Strengths
Typical Adult Dose
500 mg twice daily with meals, increased gradually
Max dose: 2550 mg/day (immediate-release) or 2000 mg/day (extended-release)
Special Populations
- Renal Impairment
- Contraindicated if eGFR < 30; use caution 30–45
- Pediatric
- Ages 10+: 500 mg twice daily, max 2000 mg/day
Metformin pricing varies dramatically by pharmacy
The same Metformin prescription can cost $14 at one pharmacy and $45 at another in the same zip code. Chain pharmacies typically charge the most. Script Unlock lets verified independent and mail-order pharmacies compete for your prescription — the winning bid is usually 70% below chain retail.
- Free — no membership, no account, no credit card upfront
- Bids in 1–4 hours from verified US pharmacies
- Locked-in price — no PBM renegotiation at checkout
- Delivery or local pickup
Related Metformin pages
Medical disclaimer: Dosage information on this page is for reference only and is not a substitute for medical advice. Your prescribing doctor determines the appropriate Metformin dose for your condition, kidney and liver function, other medications, and clinical response.