Ramadan and Diabetes
Start with an individual risk assessment
Fasting with diabetes is not a one-size-fits-all decision. The International Diabetes Federation (IDF) explains that fasting can increase the risk of hypoglycaemia, hyperglycaemia, dehydration and diabetic ketoacidosis, particularly for people using insulin or glucose-lowering medicines. The IDF-DAR risk framework is designed for an individual pre-Ramadan assessment rather than a single rule based only on diabetes type.
Speak to your diabetes team before Ramadan
A clinician can review your glucose control, medicines, complications, previous fasting experience, work pattern and other risks. Medicine dose or timing changes can be dangerous if copied from another person or changed without professional guidance.
Monitoring is part of safe planning
People who fast may need a personalised glucose-monitoring plan. Follow the targets and stop-fast instructions given by your own diabetes team. This page deliberately does not publish one universal glucose cut-off as a substitute for the current IDF-DAR assessment and your clinician’s plan.
Know the warning signs
Symptoms such as shaking, sweating, confusion, severe weakness, vomiting, marked thirst, difficulty breathing or other signs of hypo- or hyperglycaemia require prompt action according to your clinical plan. If you are acutely unwell, seek medical help.
Current sources
International Diabetes Federation: Diabetes and fasting · IDF-DAR Risk Calculator Update 2026
Medical disclaimer: this page is general educational information. It has not been individually reviewed by your doctor and cannot determine whether fasting is safe for you.
Frequently asked questions
Does checking blood glucose break the fast?
This is a religious ruling as well as a clinical question. Many contemporary authorities permit finger-prick glucose testing during the fast; follow the religious authority you trust and do not skip medically necessary monitoring.
Can I change my insulin or tablets for Ramadan myself?
No. Medication changes should be individualised by a qualified clinician who knows your diabetes history, current treatment and fasting risk.
Published Last updated Editorial standards: editorial policy.