Prostaglandin analogue
Latanoprost and smoking: how tobacco affects the medication
Tobacco smoking is one of the most underappreciated drug-drug interactions in chronic medication. Compounds in tobacco smoke induce hepatic enzymes (especially CYP1A2) and can shift the plasma concentration of many medications, including Latanoprost (Latanoprost), enough to matter clinically at 0.005%.
How smoking affects Latanoprost
Polycyclic aromatic hydrocarbons in tobacco smoke induce CYP1A2 and to a lesser extent other CYP enzymes. For medications metabolised primarily by CYP1A2, smokers can have plasma levels 30–50% lower than non-smokers at the same dose. Whether Latanoprost is affected depends on its specific metabolic pathway. Latanoprost is a prodrug ester hydrolysed by corneal esterases to its active free acid, which selectively binds the prostaglandin F (FP) receptor.
Practical guidance
According to the prescribing information for Latanoprost, smoking status should be disclosed at every dose review of Latanoprost. Stopping smoking can paradoxically raise plasma levels of CYP1A2-metabolised medications enough to cause new-onset side effects within days, and may require a temporary dose reduction. The 0.005% starting strength assumed in the prescribing information is usually for non-smokers.
Frequently asked questions
Does smoking change how Latanoprost works? ▾
For medications metabolised by CYP1A2, yes — smokers may need higher doses or have reduced effect at standard 0.005%. Whether Latanoprost specifically is affected depends on whether Latanoprost uses CYP1A2. The prescribing information notes any documented interaction.
Will I need to adjust Latanoprost if I quit smoking? ▾
Possibly, if Latanoprost is one of the medications affected by CYP1A2 induction. Stopping smoking restores CYP1A2 to normal within days, raising plasma levels and potentially causing side effects. Discuss the timing of any dose adjustment with the prescriber when planning to quit.
Products containing Latanoprost
More on Latanoprost
- With alcoholLatanoprost and alcohol — is it safe to drink?
- With foodShould Latanoprost be taken with food?
- Side effectsLatanoprost side effects: common, rare and warning signs
- Dosage guideLatanoprost dosage guide: how much to take and when
- OnsetHow fast does Latanoprost start working?
- DurationHow long does Latanoprost last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.