Long-acting insulin analogue
Insulin Glargine and cannabis (marijuana, THC)
As cannabis becomes legal or decriminalised in more jurisdictions, the practical question of combining it with prescription medication comes up regularly. Insulin Glargine (Insulin Glargine) and cannabis share several pharmacological pathways, and the combination at 100 IU/mL is not automatically benign even where both are legal.
How cannabis affects Insulin Glargine
THC and other cannabinoids are metabolised partly by hepatic CYP enzymes, including CYP3A4 — the same pathway used by many Long-acting insulin analogue medications. Frequent cannabis use can shift the metabolism of Insulin Glargine mildly. THC also has cardiovascular effects (increased heart rate, blood pressure changes) and central nervous system effects that can stack with Insulin Glargine's side-effect profile.
Practical guidance
Occasional moderate cannabis use is unlikely to cause clinically meaningful problems for most adults on Insulin Glargine at 100 IU/mL. Heavy daily use, edibles with high THC content, or cannabis combined with alcohol substantially raise the risk of dizziness, hypotension, impaired judgement and amplified side effects from Insulin Glargine. According to the prescribing information, the full list of recreational substances should be disclosed to the prescriber.
Frequently asked questions
Can I use cannabis while taking Insulin Glargine? ▾
For most adults at 100 IU/mL, occasional moderate cannabis is tolerated, but heavy daily use is not advised because of metabolic and additive cardiovascular effects with Insulin Glargine. The safe practice is to mention it to the prescriber.
Does CBD interact with Insulin Glargine? ▾
CBD inhibits several CYP enzymes including CYP3A4, which can raise plasma levels of medications that go through that pathway. For Insulin Glargine specifically, this depends on whether Insulin Glargine uses CYP3A4. Daily high-dose CBD products warrant a pharmacist check.
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.