Type 2 diabetes affects an estimated 4.2 million Nigerians, with projections suggesting this will double by 2045. It is a condition almost entirely manageable with the right medication, monitoring, and lifestyle — yet it is also one of the conditions where poor medication adherence causes the most harm.
This guide covers the core classes of diabetes medication, how to store them, and the monitoring habits that keep blood sugar in a safe range.
Common diabetes medications and how they work
Most type 2 diabetes patients start on metformin — an inexpensive, well-tolerated oral drug that reduces glucose production in the liver and improves insulin sensitivity. It is taken with food to minimise GI side effects.
If blood sugar remains uncontrolled on metformin alone, a second or third agent is often added. Common additions include sulphonylureas (glibenclamide, glipizide), SGLT2 inhibitors (dapagliflozin, empagliflozin), or DPP-4 inhibitors (sitagliptin). Each class works through a different mechanism and has different side effect profiles.
Some patients eventually require insulin. The transition to insulin is often emotionally difficult for patients, but it is a natural progression — not a failure — and modern insulin pens have made self-injection straightforward.
Insulin storage: the rules that matter most
Unopened insulin must be refrigerated (2–8°C). Never freeze it — frozen insulin is irreversibly damaged and should not be used.
Once opened, most insulin vials and pens can be kept at room temperature (below 25°C) for up to 28 days. In Nigeria's climate, this is often challenging. Keep opened insulin away from direct sunlight and do not store it near a car dashboard, windowsill, or oven.
- Check for cloudiness or particles in clear insulin — discard if present
- Mix cloudy (NPH) insulin by rolling gently, not shaking
- Mark your pen or vial with the date you opened it
- Never share insulin pens — only the cartridge is shareable, never the pen device itself
Monitoring your blood sugar
Medication works in the context of monitoring. Without blood glucose data, neither you nor your doctor can know whether your current regimen is working.
The target range for most type 2 diabetics is fasting blood glucose of 4–7 mmol/L (72–126 mg/dL) and post-meal glucose below 10 mmol/L (180 mg/dL). Your doctor may give you different targets based on your age and other conditions.
Test at consistent times — fasting in the morning and two hours after your largest meal gives the most actionable data. Keep a log (a simple notebook or a glucose monitoring app) and bring it to every pharmacy and clinic visit.
When to call your pharmacist or doctor immediately
- Blood sugar consistently above 15 mmol/L despite medication
- Symptoms of hypoglycaemia: sweating, shaking, confusion, pale skin
- Swelling in legs or feet (possible renal or cardiac complication)
- Any new prescription from a different doctor before taking it — potential interactions are common
- Side effects like persistent nausea, dark urine, or muscle pain