Glimepiride: how it works and how to avoid low blood sugar

By the Medsmingle Team · Updated 13 November 2026

This is a prescription medicine. Only take it if it has been prescribed for you after a medical assessment, and follow your doctor’s and pharmacist’s instructions.

Glimepiride (Amaryl) is a sulfonylurea that helps the pancreas release more insulin. It’s an effective, low-cost option for type 2 diabetes, often added to metformin.

How to take it

Once a day with breakfast or the first main meal. Ask your diabetes team for a written plan for missed meals, fasting or illness; do not make routine dose changes yourself.

Low blood sugar (hypoglycemia)

This is the main risk. Signs: shakiness, sweating, fast heartbeat, hunger, confusion, irritability.

Rule of 15: take 15 g of fast sugar (4 oz juice or regular soda, or glucose tablets), recheck in 15 minutes, repeat if still low, then eat a snack. Only give oral sugar if the person is awake and able to swallow safely. For unconsciousness, a seizure or inability to swallow, call emergency services; give prescribed glucagon if available and you know how. Never give food or drink to an unconscious person.

Higher risk if you

• Skip meals or exercise more than usual
• Drink alcohol
• Are older or have kidney problems
• Take insulin or some antibiotics (such as ciprofloxacin, clarithromycin)

Other side effects

• Weight gain
• Nausea
• Increased sun sensitivity
• Rare skin or blood reactions

Frequently asked questions

Can I take glimepiride at night?

It is generally taken with breakfast or the first main meal. Follow your prescription and ask before changing the timing.

For questions about a prescription or symptoms, speak with your own doctor or pharmacist. For website enquiries, contact our team.

General information only. It isn’t a substitute for advice from your doctor or pharmacist.

Source

MedlinePlus patient medicine information. This overview does not list every warning or interaction.