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Medicine

Metformin – type 2 diabetes

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A simple and personal explanation of the medicine for patients and families.

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Overview

Metformin helps the body manage blood sugar in a steadier and more balanced way. Many people start this medicine when type 2 diabetes is diagnosed because it supports the body without usually causing a sudden strong drop in blood sugar.

Ibrahim's pharmacy advice

I often explain it like this: metformin is not a medicine you usually feel working right away. It quietly helps move the body in a better direction over time. At the beginning, some people notice stomach upset, but this often improves when the dose is increased slowly and the medicine is taken with food. So patience and consistency really matter with metformin.

Use

  • Metformin is used to treat type 2 diabetes.
  • It helps control blood sugar and is often used together with diet, exercise, and weight management.
  • For many people, it is the first medicine started for type 2 diabetes.

Dosage and Ibrahim's advice

  • Treatment often starts with a low dose and then increases gradually.
  • It is often taken 1 to 2 times daily as prescribed.
  • It is best taken with food to reduce stomach side effects.
  • If kidney function is reduced, the dose may need to be changed or the medicine may not be suitable.

Side effects

  • The most common effects at the start are diarrhoea, nausea, vomiting, or stomach pain.
  • Some people notice changes in taste.
  • With long-term use, some may develop vitamin B12 deficiency.
  • Stomach problems often improve when the medicine is started slowly or taken with food.

Drug interactions

  • Some medicines, such as steroids, can affect blood sugar.
  • During CT or X-ray scans with contrast, metformin may sometimes need to be paused temporarily.
  • Heavy alcohol use and some medicines affecting the kidneys may increase the risk of complications.
  • Always tell your doctor or pharmacist about all medicines you use.

Important warnings

  • Take metformin with food to reduce stomach side effects.
  • Contact a doctor if you become dehydrated, have severe vomiting, a serious infection, or breathing problems.
  • Before surgery or scans with contrast, you may be given special instructions about your treatment.
  • If you become very unwell and can hardly eat or drink, your treatment may need to be reviewed temporarily.

Ramadan and fasting

  • Metformin tablets break the fast if taken during the daytime.
  • Metformin alone does not usually cause low blood sugar, but fasting changes meal timing.
  • Doses can often be planned for Iftar and/or Suhoor.
  • Speak with your doctor if you feel dizzy, weak, or are eating too little while fasting.

Food and drink

  • Take with food and water.
  • Follow general dietary advice for diabetes.
  • Be careful with alcohol, especially in larger amounts.
  • Regular meals and physical activity still matter even when you take metformin.

Storage

  • Keep out of reach of children and store below 25 °C.
  • Keep in the original packaging to protect from moisture.
  • Do not use after the expiry date.
  • Return leftovers to the pharmacy.

Sources

This text is written in a personal and simple style, but the medical information is based on official sources.