Biguanide
How to take Metformin tablets correctly
How a tablet is swallowed matters for absorption, gastric tolerance and avoiding oesophageal irritation. Metformin (Metformin) at 500mg, 850mg, 1000mg is straightforward to take for most adults but a few practical points reduce variability and minimise local side effects.
Standard administration of Metformin
Most tablet, extended-release tablet of Metformin are taken whole with a full glass of water (about 200 mL). Sitting or standing upright for 10–15 minutes after dosing reduces the risk of the tablet lodging in the oesophagus and causing local irritation. Sufficient water carries the medication into the stomach where dissolution and absorption begin.
Practical tips and what to avoid
According to the prescribing information for Metformin, taking Metformin with too little water or while lying down increases oesophageal exposure and can cause heartburn-like irritation in susceptible users. Lukewarm or cool water is preferable to very hot water. Tablets should not be chewed unless explicitly authorised by the prescriber for the formulation; Metformin's principal effect is to suppress hepatic glucose production by inhibiting mitochondrial complex I, which raises the cellular AMP/ATP ratio and activates AMP-activated protein kinase.
Frequently asked questions
How much water should I take with Metformin? ▾
A full glass — about 200 mL — is the standard recommendation for Metformin at 500mg, 850mg, 1000mg. Less water increases the risk of the tablet sticking on the way down and causing local irritation.
Can I take Metformin without water? ▾
It is not advisable. Tablets without water can lodge in the oesophagus and cause local irritation; some formulations require water for proper dissolution. Always take Metformin with adequate water unless the formulation explicitly says otherwise.
Products containing Metformin
More on Metformin
- With alcoholMetformin and alcohol — is it safe to drink?
- With foodShould Metformin be taken with food?
- Side effectsMetformin side effects: common, rare and warning signs
- Dosage guideMetformin dosage guide: how much to take and when
- OnsetHow fast does Metformin start working?
- DurationHow long does Metformin last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.