Long-acting insulin analogue
Insulin Glargine drug interactions: a practical overview
Drug interactions are the single biggest cause of preventable medication problems. Insulin Glargine (Insulin Glargine) interacts to varying degrees with several classes of medication and with a smaller list of foods. This page summarises the practically important ones at 100 IU/mL, framed for a real-world prescription review rather than an exhaustive PDF list.
High-priority interactions for Insulin Glargine
For Insulin Glargine, the most clinically relevant interactions are typically with strong CYP3A4 inhibitors and inducers, with cardiovascular medications (notably nitrates for several Long-acting insulin analogue agents), with central nervous system depressants, and with medications affecting blood pressure or heart rate. Insulin glargine binds the insulin receptor with similar affinity to human insulin, activating intracellular signalling that increases glucose uptake in muscle and adipose tissue, suppresses hepatic g…
Working with the pharmacist
A pharmacist review of all current medications is the practical safeguard against unintended interactions with Insulin Glargine. According to the prescribing information for Insulin Glargine, the full medication list — prescription, OTC, supplements and recreational substances — should be reviewed before starting and at every dose change at 100 IU/mL.
Frequently asked questions
What's the most important Insulin Glargine interaction to know? ▾
For most Long-acting insulin analogue medications, the highest-priority interaction is with nitrate medications used for chest pain — this combination is often a hard contraindication. After that, strong CYP3A4 inhibitors (some antifungals, macrolides) are the next concern at routine 100 IU/mL doses.
Do I need to tell the pharmacist about supplements? ▾
Yes. Supplements and herbal products can interact with Insulin Glargine in ways that prescription drug-drug interaction databases miss. The pharmacist needs the complete picture — including supplements like St John's Wort, grapefruit-containing products and high-dose vitamins — to flag risks at 100 IU/mL.
Products containing Insulin Glargine
More on Insulin Glargine
- With alcoholInsulin Glargine and alcohol — is it safe to drink?
- With foodShould Insulin Glargine be taken with food?
- Side effectsInsulin Glargine side effects: common, rare and warning signs
- Dosage guideInsulin Glargine dosage guide: how much to take and when
- OnsetHow fast does Insulin Glargine start working?
- DurationHow long does Insulin Glargine last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.