Xalatan 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. Xalatan (Latanoprost) and cannabis share several pharmacological pathways, and the combination at 0.005% is not automatically benign even where both are legal.
How cannabis affects Xalatan
THC and other cannabinoids are metabolised partly by hepatic CYP enzymes, including CYP3A4 — the same pathway used by many Eye Care and Ophthalmic Treatments medications. Frequent cannabis use can shift the metabolism of Latanoprost mildly. THC also has cardiovascular effects (increased heart rate, blood pressure changes) and central nervous system effects that can stack with Xalatan's side-effect profile.
Practical guidance
Occasional moderate cannabis use is unlikely to cause clinically meaningful problems for most adults on Xalatan at 0.005%. 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 Latanoprost. 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 Xalatan? ▾
For most adults at 0.005%, occasional moderate cannabis is tolerated, but heavy daily use is not advised because of metabolic and additive cardiovascular effects with Latanoprost. The safe practice is to mention it to the prescriber.
Does CBD interact with Xalatan? ▾
CBD inhibits several CYP enzymes including CYP3A4, which can raise plasma levels of medications that go through that pathway. For Xalatan specifically, this depends on whether Latanoprost uses CYP3A4. Daily high-dose CBD products warrant a pharmacist check.
More on Xalatan
- With alcoholXalatan and alcohol — is it safe to drink?
- With foodShould Xalatan be taken with food?
- Side effectsXalatan side effects: common, rare and warning signs
- Dosage guideXalatan dosage guide: how much to take and when
- OnsetHow fast does Xalatan start working?
- DurationHow long does Xalatan last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.