Reviewed by Chris Woods, MSN, APRN, FNP-C — Licensed Nurse Practitioner. Medically reviewed and updated for accuracy in March 2026.
What is Fluconazole?
Fluconazole — sold under the brand name Diflucan — is a prescription oral antifungal medication. It's a single-dose treatment for uncomplicated vaginal yeast infections. Unlike antibiotics (which fight bacteria), fluconazole specifically kills yeast by attacking their cell membranes. Once fluconazole is in your system, it gets to work fast.
Why it works so well: Fluconazole disrupts ergosterol, a key component of yeast cell membranes. Without it, the yeast cell wall falls apart, and the fungus dies. Bacteria don't have ergosterol — so fluconazole leaves your normal bacterial flora untouched.
What Does Fluconazole Treat?
Fluconazole is approved for uncomplicated vaginal yeast infections caused by Candida albicans. It can also be prescribed for other fungal infections depending on your situation — always follow your provider's specific instructions.
How to Take Fluconazole
Fluconazole is a single-dose medication. Here's what you need to know.
| Condition |
Dose |
Timing |
| Uncomplicated vaginal yeast infection |
150mg (one pill) |
Single dose, one time |
| Recurrent infections (per provider) |
150mg repeated |
Every 3 days for 2-3 doses (provider discretion) |
Pro tip: Take fluconazole with or without food — it works either way. You don't need to adjust anything about your diet or routine.
Timeline for Relief
Most people start feeling better within 24–72 hours. The itching and burning usually ease up first, followed by discharge. Some people feel relief within 24 hours. If you're not feeling better by day 3, contact your provider — your infection might need a different approach.
Side Effects
Most people tolerate fluconazole well. A single dose means side effects are usually mild and short-lived.
Common Side Effects
- Headache
- Nausea
- Stomach pain or discomfort
- Diarrhea
- Mild dizziness
These usually go away within a few hours to a day. Taking fluconazole with food can help reduce nausea.
Serious Side Effects (Rare)
- Liver damage (rare at single dose)
- QT prolongation (heart rhythm changes)
- Severe skin reactions (Stevens-Johnson Syndrome)
- Severe allergic reactions (swelling, trouble breathing)
- Severe liver problems
Serious side effects are uncommon, especially with a single dose. Call your provider immediately if you experience any of these.
When to Call Your Provider
Watch for these warning signs. If you experience any of them, contact your provider right away.
Stop and call immediately if you have:
- Yellowing of skin or eyes
- Severe rash or blistering skin
- Irregular heartbeat or chest pain
- Severe allergic reaction (swelling of face, lips, tongue, or throat)
- Signs of liver problems (dark urine, pale stools, persistent nausea)
- Severe stomach pain
Important Warnings & Interactions
Tell your provider about your full health history and all medications before taking fluconazole. Some conditions and drug interactions matter.
Tell Your Provider If You Have:
- Liver disease or liver problems — Fluconazole is processed by the liver
- Heart conditions, especially QT prolongation — Fluconazole can affect heart rhythm in rare cases
- Pregnancy — Discuss the risks vs. benefits with your provider; single-dose fluconazole is usually considered lower risk, but it's a conversation
- Kidney disease — Fluconazole is cleared by the kidneys
- Allergies to azole medications — Let your provider know if you've had reactions to ketoconazole or itraconazole
Drug Interactions (Important)
Fluconazole can interact with several medications. Tell your provider about all drugs you take, especially:
- Warfarin (blood thinner) — Significant interaction; fluconazole can increase warfarin levels
- Statins (cholesterol drugs) — Can increase statin levels, raising risk of muscle problems
- Certain seizure medications — Fluconazole may change their effectiveness
- Some blood pressure medications — Talk to your provider about timing
Always bring a complete list of your medications — including over-the-counter drugs, vitamins, and supplements — when you contact your provider. Interactions matter, and your provider will help navigate them safely.
Frequently Asked Questions
How long does fluconazole take to work?
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Most people start feeling better within 24–72 hours. That said, fluconazole kills yeast by disrupting their cell membranes, so relief comes fairly quickly. The itching and burning usually ease up first, followed by discharge. If you're not better by day 3, reach out to your provider.
Can I have sex after taking fluconazole?
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It's best to wait until your symptoms are completely gone — typically 24–48 hours after taking the dose. And if your partner has any symptoms, they'll need treatment too. Tell them straight up. This isn't a solo thing.
What if my symptoms don't go away after one dose?
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Sometimes a single 150mg dose isn't enough — especially for severe or recurrent infections. Your provider might prescribe a second dose 3 days after the first, or suggest a longer treatment course. Don't double up on doses on your own. Text or call your provider if things aren't improving.
Can I take fluconazole while pregnant?
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This is a conversation you need to have with your provider. Single-dose fluconazole is generally considered lower risk, but pregnancy changes everything — especially in the first trimester. Your provider knows your full history and will make the safest call. Don't avoid treatment either — untreated yeast infections can cause problems too.
Can I drink alcohol after taking fluconazole?
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Alcohol won't directly interact with fluconazole like it does with some medications. But it can make nausea worse and slow your healing. Skip it for at least 48 hours after your dose. Your body will thank you, and recovery is faster.
Medical References & Citations
- FDA DailyMed: Fluconazole oral medication information, labeling, and adverse reactions. Updated 2025. Available at dailymed.nlm.nih.gov
- CDC Candidiasis Treatment Guidelines: Centers for Disease Control and Prevention. Vulvovaginal candidiasis treatment recommendations. Available at cdc.gov
- UpToDate: "Fluconazole: Drug information" — Comprehensive clinical resource for healthcare providers. Accessed March 2026.
- ACOG Guidelines: American College of Obstetricians and Gynecologists. Vulvovaginal candidiasis: Treatment and management. Clinical Guidelines, 2025.
Have Questions? We're Here to Help
Text us with questions about fluconazole or any other health concerns. $59 flat — no appointment, no paperwork, just care.
Text (480) 639-4722
— Chris
NPCWoods