Jublia Drug Interactions: What to Avoid and What to Tell Your Doctor

One of the most frequently asked questions about Jublia (efinaconazole) is whether it interacts with other medications. The answer is reassuring: Jublia has no known clinically significant drug interactions. But that doesn't mean you should skip telling your doctor about everything you're taking. Here's the full picture.

Why Jublia Has Minimal Drug Interactions

Most drug interactions occur when a medication is metabolized by the liver's cytochrome P450 (CYP450) enzyme system — the same system that processes hundreds of commonly used drugs. Oral azole antifungals like fluconazole, itraconazole, and voriconazole are potent CYP450 inhibitors and interact with dozens of medications.

Jublia is different. As a topical solution applied to the toenail, it has minimal systemic absorption. Very little efinaconazole actually enters the bloodstream — in clinical studies, mean plasma concentrations were just 0.67 ng/mL after 28 days of daily application to all 10 toenails. At those levels, there is virtually no meaningful interaction with CYP450 enzymes or other systemic drug-metabolizing pathways.

Known Drug Interactions with Jublia

As of 2026, no clinically significant drug interactions with Jublia have been identified in clinical trials or post-marketing surveillance. The FDA-approved prescribing information states that there are no known drug interactions.

There are also no known interactions between Jublia and:

Food or drinks (including alcohol)

Vitamins, minerals, or herbal supplements

Other topical medications applied to different body areas (unless applied to the same location)

Comparing Jublia to Oral Antifungal Drug Interactions

One of the clearest reasons some patients and providers prefer Jublia over oral alternatives is the absence of drug interactions. Compare Jublia to the most common oral alternatives:

Terbinafine (generic Lamisil): Inhibits CYP2D6. Significant interactions with tricyclic antidepressants (amitriptyline, nortriptyline), SSRIs (fluoxetine, paroxetine), atypical antipsychotics (risperidone, aripiprazole), beta-blockers (metoprolol, propranolol), and tamoxifen. These interactions can increase blood levels of the interacting drug to potentially toxic ranges.

Itraconazole (generic Sporanox): A major CYP3A4 inhibitor. Has an extensive interaction profile including statins (can cause rhabdomyolysis), calcium channel blockers, benzodiazepines, anticoagulants, and many others. FDA has issued black box warnings about certain combinations.

Jublia (efinaconazole topical): No known clinically significant drug interactions. Not metabolized by liver CYP450 enzymes at clinically meaningful levels due to minimal systemic absorption.

This interaction-free profile makes Jublia particularly valuable for elderly patients, patients on polypharmacy, and anyone taking medications that interact with oral azoles or terbinafine.

Still Tell Your Doctor About Everything You're Taking

Even though no drug interactions with Jublia have been documented, you should still provide your prescriber with a complete list of:

All prescription medications you take

Over-the-counter medications and supplements

Other topical products used on your feet or nails

This is important because your prescriber may be choosing between Jublia and an oral antifungal — and your medication list might influence which is safer for you.

Interactions with Nail Polish and Cosmetic Products

Jublia's prescribing information specifically cautions against using nail polish, gel nails, acrylic nails, and cosmetic nail products during treatment. It is unclear whether these products affect how well Jublia works — they may block the solution from reaching the nail surface and infection site. Until your nail clears, avoid cosmetic nail treatments on the affected toenails.

Alcohol and Jublia

There are no known interactions between Jublia and alcohol. However, heavy alcohol consumption can impair immune function, potentially making it harder for your body to fight infections — including nail fungus. Additionally, Jublia's own vehicle contains alcohol and is flammable; do not use it near open flames regardless of whether you drink.

The Bottom Line on Jublia Interactions

Jublia's topical route of administration and minimal systemic absorption make it one of the safest antifungal options from a drug interaction standpoint. It is particularly advantageous for patients who take multiple medications and are at risk from oral antifungal interactions. For more information on Jublia's safety profile, see our guide on Jublia side effects. And if you need help finding Jublia at a pharmacy near you, medfinder can help.