Medication Adjustments During Ramadan for Diabetes

Pre-Ramadan Risk Assessment

The American Diabetes Association recommends conducting comprehensive pre-Ramadan assessment 6-8 weeks before fasting begins to evaluate glycemic control, renal function, and stratify hypoglycemia risk 1
Patients with type 1 diabetes should be strongly advised against fasting due to very high risk of severe hypoglycemia and diabetic ketoacidosis 2, 3, 4
The American College of Endocrinology suggests that patients with history of recurrent hypoglycemia, hypoglycemia unawareness, or poorly controlled diabetes are at very high risk and should avoid fasting 2, 3
Pregnant women with any form of diabetes must avoid fasting due to high maternal and fetal morbidity risk 4

The European Association for the Study of Diabetes recommends giving two-thirds of total daily dose of metformin immediately before Iftar and one-third before Suhoor 2, 3, 1, 4
For example, if taking 500 mg of metformin three times daily, adjust to 1000 mg at Iftar and 500 mg at Suhoor 2, 3
The American Association of Clinical Endocrinologists states that hypoglycemia risk is minimal with metformin alone, making it safe for fasting 4
The International Diabetes Federation suggests that for once-daily sulfonylureas, shift entire dose to before Iftar and consider reducing to 75% of pre-Ramadan dose 2, 3, 1
For twice-daily sulfonylureas, give half the usual morning dose at Suhoor and full dose at Iftar 2, 3, 4

The American Diabetes Association recommends giving the usual morning dose of premixed insulin at Iftar and half the usual evening dose at Suhoor 2, 3, 4
Consider switching to basal insulin plus rapid-acting insulin for more flexible dosing 2, 3
Patients on basal insulin face similar risks to type 1 diabetes and require significant dose reduction with multiple daily glucose checks 4

The American College of Endocrinology states that breaking the fast immediately is necessary if blood glucose drops below 70 mg/dL 1

The European Association for the Study of Diabetes recommends self-monitoring blood glucose intensively during the first 3-4 weeks of Ramadan, focusing on the first few hours after starting the fast, late afternoon before breaking fast, and post-Iftar to detect hyperglycemia 1
Target glycemic goals during Ramadan: time in range >70%, time below range <4%, time in severe hypoglycemia <1% 1

The American Association of Clinical Endocrinologists warns that excessive insulin reduction risks hyperglycemia and diabetic ketoacidosis 4
Ensure adequate fluid intake during non-fasting hours to prevent dehydration and thrombotic events 4
Patients must receive education on physical activity, meal planning, glucose monitoring, and medication timing before Ramadan begins 2, 3

The International Diabetes Federation recommends returning all medications to pre-Ramadan dosing and timing immediately after Ramadan ends 1
Assess overall glycemic control, complications, and the fasting experience to guide future Ramadan planning 1

The European Association for the Study of Diabetes recommends self-monitoring blood glucose intensively during the first 3-4 weeks of Ramadan fasting, including the first few hours after starting the fast, late afternoon before breaking fast, post-Iftar, pre-Suhoor, and ≥2 hours after Iftar 5

Continuous glucose monitoring (CGM) significantly improves safety during Ramadan fasting by providing real-time data for dynamic insulin adjustments, minimizing severe glycemic events, monitoring nocturnal glucose fluctuations, and helping identify patterns related to Suhoor and Iftar meals 5
Automated insulin delivery (AID) systems offer the highest level of safety by continuously adjusting basal insulin delivery based on real-time glucose readings, reducing hypoglycemia risk during fasting, automatically administering correction doses to manage hyperglycemia after Iftar, and optimizing insulin delivery during Taraweeh prayers to prevent glucose drops 5