Metformin
متفورمین
🍽️ Alimentary Tract And MetabolismBiguanide
Market / country: 🇺🇸 USA
Glucophage (US)
🧮 Dose calculator
Type 2 diabetes mellitus · Regimen source: FDA Metformin · 2.2FDA Metformin · 8.4
- • With meals; increase by 500 mg weekly per glycemic control and tolerability, max 2000 mg/day in two doses. FDA Metformin · 2.2
Enter age (weight is optional for this regimen).
🛡️ Safety & information
Contraindications
- ⛔ Severe renal impairment (eGFR <30); metabolic acidosis incl. DKA; hypersensitivity. FDA Metformin · 4
- ⛔ Not established under 10 years. FDA Metformin · 8.4
Warnings
- • Boxed warning: lactic acidosis (can be fatal). FDA Metformin · WARNING: LACTIC ACIDOSIS
Renal adjustment
- • eGFR < 45: Initiation not recommended at eGFR 30–45; contraindicated below 30. FDA Metformin · 2.3
- • eGFR < 30: eGFR <30: contraindicated. FDA Metformin · 2.3
Formulations
- 500 mg tablet — tablet 🇺🇸 USA FDA Metformin · 3
- 850 mg tablet — tablet 🇺🇸 USA FDA Metformin · 3
- 1000 mg tablet — tablet 🇺🇸 USA FDA Metformin · 3
👥 Special populations
- 🤰 PregnancyUse with caution
Label states no clear risk or has limited data; use only if needed, under medical advice. FDA Metformin · 8.1
“Risk Summary Limited data with metformin hydrochloride in pregnant women are not sufficient to determine a drug-associated risk for major birth defects or miscarriage.”
- 🤱 BreastfeedingUse with caution
Label: use with caution while breastfeeding; see the label text. FDA Metformin · 8.2
“Risk Summary Limited published studies report that metformin is present in human milk [see Data].”
- 👶 ChildrenUse with caution
The label has conditions, age limits or notes for children; the label sentence is quoted below. FDA Metformin · 8.4
“The safety and effectiveness of metformin hydrochloride for the treatment of type 2 diabetes mellitus have been established in pediatric patients 10 to 16 years old.”
- 👴 Older adultsUse with caution
Label: use with caution in older adults, usually starting at the low end of the dose range. FDA Metformin · 8.5
“In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy and the higher risk of lactic acidosis.”
- ⚥ Females & males of reproductive potentialUse with caution
Label has advice on pregnancy testing, contraception or fertility for females and males. FDA Metformin · 8.3
“Discuss the potential for unintended pregnancy with premenopausal women as therapy with metformin hydrochloride may result in ovulation in some anovulatory women.”
🔗 Reference links
- FDA (approval record)ANDA077095
- DailyMed (FDA label)FDA Metformin
- MedlinePlus (NIH)Metformin
- WHO ATC/DDDA10BA02
- Darooyab (Iran)Metformin
🇮🇷 Registered in Iran Darooyab · G-640/Metformin
Dosage forms with Iranian generic codes, per Darooyab.
- 16845 · METFORMIN HCL 1000MG EXTENDED RELEASE TAB · قرص آهستهرهش متفورمین هیدروکلراید ۱۰۰۰ میلیگرم
- 10915 · METFORMIN HCL 1000MG TAB · قرص متفورمین هیدروکلراید ۱۰۰۰ میلیگرم
- 21080 · METFORMIN HCL 500MG CAP · کپسول متفورمین هیدروکلراید ۵۰۰ میلیگرم
- 21337 · METFORMIN HCL 500MG EXTENDED RELEASE TAB · قرص آهستهرهش متفورمین هیدروکلراید ۵۰۰ میلیگرم
- 00817 · METFORMIN HCL 500MG TAB · قرص متفورمین هیدروکلراید ۵۰۰ میلیگرم
- 16844 · METFORMIN HCL 750MG SR TAB · قرص آهستهرهش متفورمین هیدروکلراید ۷۵۰ میلیگرم
- 16430 · METFORMIN HCL 750MG TAB · قرص متفورمین هیدروکلراید ۷۵۰ میلیگرم
- 10073 · METFORMIN HCL 850MG TAB · قرص متفورمین هیدروکلراید ۸۵۰ میلیگرم
- 52888 · METFORMIN HYDROCHLORIDE TABLET ORAL 850 mg · قرص متفورمین هیدروکلراید ۸۵۰ میلیگرم
- 52921 · METFORMIN HYDROCHLORIDE SOLUTION ORAL 500 mg/5mL 250 mL · محلول خوراکی متفورمین هیدروکلراید ۵۰۰ میلیگرم / ۵ میلیلیتر ۲۵۰ میلیلیتر
📚 Reference status for this drug
Shows which sources have references recorded for this drug and which do not.
- FDA label (DailyMed)✅ PresentFDA Metformin · 3FDA Metformin · 2.2FDA Metformin · 8.4FDA Metformin · 2.1FDA Metformin · 4FDA Metformin · WARNING: LACTIC ACIDOSISFDA Metformin · 2.3FDA Metformin · 8.1FDA Metformin · 8.2FDA Metformin · 8.5FDA Metformin · 8.3FDA Metformin · SPL approval / marketing category
- UK SmPC (eMC / MHRA)❌ Not present
- Published guideline❌ Not present
- Licensed reference (medical school)❌ Not present
- Iranian leaflet (IFDA)❌ Not present
- Pharmacy website (secondary, unreliable)✅ PresentDarooyab · G-640/Metformin
- Clinical review⚠ Unverified