Pre-Ramadan counselling in a patient with type 2 diabetes, CKD and a history of hypoglycaemia
Yousef is 52 and works as an administrative clerk in a Kuwaiti ministry. He has had type 2 diabetes for nine years; his last HbA1c was 9.1% and his eGFR is 42 mL/min/1.73 m². He takes metformin 1 g twice daily, gliclazide MR 60 mg each morning, ramipril 10 mg and atorvastatin 20 mg. His BMI is 33. In the previous Ramadan he had two symptomatic hypoglycaemic episodes, both around 4 pm, both self-treated with juice, and he has had no severe episode since. He attends three weeks before Ramadan asking whether he can fast. His father and brothers all fast and he says his colleagues expect it. He works 8 am to 2 pm and drives 35 minutes each way. He has heard that injections are allowed and asks whether switching to insulin would make fasting easier.
1. How do you stratify his fasting risk, and what do you say to him in this first consultation?
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Frame the risk with a structured tool (IDF-DAR) rather than a personal opinion, because otherwise he hears either 'you must not fast' as a religious judgement or 'you can fast' as medical clearance.
The drivers here are: a sulphonylurea, which is the most modifiable contributor to fasting hypoglycaemia; documented symptomatic hypoglycaemia in the previous Ramadan at a predictable time of day; HbA1c 9.1%; CKD stage 3b; summer heat with a car commute; and driving. Together these place him in a moderate-to-high risk category. High risk is not a prohibition. The religious exemption exists precisely for people like him, but the decision is his once he is informed.
What to say: state the risk plainly and without alarm; say that many people at his level of risk fast safely if medication is adjusted and glucose is monitored; agree a written individualised plan; ask about his real working day, suhoor and iftar times, and who is with him if he becomes hypoglycaemic. Make clear that he must break the fast for glucose below 3.9 mmol/L, and that a severe episode, or any episode while driving, changes the plan for the remainder of the month. Document the discussion.
2. Set out his medication plan for Ramadan and explain why each change is made.
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The aim is to reduce hypoglycaemia risk while keeping glycaemic control, and to shift drug timing to the two meals.
- Gliclazide: this is the main problem drug. Either reduce to 30 mg with suhoor, or preferably switch to a low-hypoglycaemia agent such as sitagliptin, dosed for his eGFR (50 mg daily at eGFR 30-45) and taken at iftar. A DPP-4 inhibitor is well suited to fasting because it does not cause hypoglycaemia when used alone.
- Metformin: safe in fasting. Give 1 g with suhoor and 1 g with iftar; if he gets gastrointestinal upset, split the evening dose.
- Ramipril and atorvastatin: timing is flexible. Move ramipril to iftar if he becomes light-headed during the day.
- Insulin: refuse this request with an explanation. Insulin is not a fasting facilitator; it increases hypoglycaemia risk, particularly with a sulphonylurea still on board, and would need a basal-only regimen with dose reduction and much closer monitoring. He does not need it to fast.
- SGLT2 inhibitors: if considered later for renal or cardiovascular protection, do not start during Ramadan; established use requires hydration advice and holding during acute illness because of euglycaemic ketoacidosis risk.
Add home glucose monitoring at midday, mid-afternoon (his previous hypo time) and whenever symptomatic.
3. What safety-netting and self-management instructions do you give, and how do you handle driving?
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Break-the-fast rules: glucose below 3.9 mmol/L, any hypoglycaemic symptoms, or glucose above 16.7 mmol/L with symptoms (vomiting, drowsiness, abdominal pain). Give the numbers in writing in Arabic and English and check he can repeat them back.
Sick-day rules: if he is unwell, vomiting or unable to drink, he should not fast that day, should hold metformin and the sulphonylurea, and should seek review. Dehydration in the heat is a genuine hazard even with a normal glucose.
Driving: he must test before every journey and not drive below 5 mmol/L; carry fast-acting carbohydrate in the car, not in the boot; avoid driving in the two hours before iftar, which is when both his previous episodes occurred; if he feels hypoglycaemic, stop, treat, wait 45 minutes and recheck before moving off. Advise breaking the fast rather than driving home at 4 pm with a glucose of 3.5.
Other points: continue the evening meal with slow-release carbohydrate, avoid very sugary iftar drinks that cause rebound, keep fluids up overnight, and know that the nearest health centre runs evening hours. Offer a review at one week into Ramadan and a phone check at two weeks.