Diflucan drug interactions: a practical overview
Drug interactions are the single biggest cause of preventable medication problems. Diflucan (Fluconazole) interacts to varying degrees with several classes of medication and with a smaller list of foods. This page summarises the practically important ones at 50mg, 100mg, 150mg, 200mg, framed for a real-world prescription review rather than an exhaustive PDF list.
High-priority interactions for Diflucan
For Fluconazole, the most clinically relevant interactions are typically with strong CYP3A4 inhibitors and inducers, with cardiovascular medications (notably nitrates for several Antifungal Medications agents), with central nervous system depressants, and with medications affecting blood pressure or heart rate. Fluconazole is a triazole antifungal that inhibits the cytochrome P450-dependent enzyme lanosterol 14-alpha-demethylase, blocking the synthesis of ergosterol from lanosterol.
Working with the pharmacist
A pharmacist review of all current medications is the practical safeguard against unintended interactions with Diflucan. According to the prescribing information for Fluconazole, the full medication list — prescription, OTC, supplements and recreational substances — should be reviewed before starting and at every dose change at 50mg, 100mg, 150mg, 200mg.
Frequently asked questions
What's the most important Diflucan interaction to know? ▾
For most Antifungal Medications 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 50mg, 100mg, 150mg, 200mg doses.
Do I need to tell the pharmacist about supplements? ▾
Yes. Supplements and herbal products can interact with Diflucan 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 50mg, 100mg, 150mg, 200mg.
More on Diflucan
- With alcoholDiflucan and alcohol — is it safe to drink?
- With foodShould Diflucan be taken with food?
- Side effectsDiflucan side effects: common, rare and warning signs
- Dosage guideDiflucan dosage guide: how much to take and when
- OnsetHow fast does Diflucan start working?
- DurationHow long does Diflucan last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.