How Long Does Fluconazole Stay in Your System?

Fluconazole (brand name: Diflucan) is an antifungal used to treat different infections caused by fungi and yeasts. A common question from patients is, how long does Fluconazole stay in your system?

With Diflucan, the body clears the drug in around 5 to 6 days after the last dose. It has a long half-life, and the effects of the drug continue after a person has stopped taking it. For this reason, only one dose is usually prescribed for infections such as a vaginal yeast infection.

Knowledge of how long Fluconazole stays in the system is useful to know if there is regular consumption of alcohol or if there are other medications because this can increase the negative effects and reduce the effectiveness of the treatment.

What Is Fluconazole?

This drug is an antifungal that is classified under the azole class. It disrupts the formation of cells and membranes in fungi, as well as halts the spread and growth of existing fungi.

Typical use of this drug is for:

• Vaginal yeast infections
• Oral thrush
• Urinary fungal infections
• Blood fungal infections
• Infections of the esophagus
• Fungal Infections of the Spleen and Liver

Diflucan is offered in a variety of formulations such as oral dosage forms (liquid and solids) and injections.

According to 2022 reports on U.S. prescriptions, Fluconazole was a very common antifungal and had over 3 million prescriptions.

Understanding Diflucan Half-Life

The half-life of Diflucan is approximately 20-50 hours. A half-life is understood as the time required for half of the drug to be cleared from the body.

Since this medication has a long half-life:

• It takes about 30 hours for about half of the dose to be eliminated from the body.
• In about 5 to 6 days, most of the dose will be eliminated from the body.
• There may still be small, undetectable, amounts of the drug for about 10 days.

This timeframe will be affected by the individual’s health status and metabolism, as well as the person’s renal health status and the amount and frequency of dose.

How Long Does Fluconazole Stay in Different Parts of the Body?

Diflucan distributes well to most body tissues and fluids which means Fluconazole can be used to treat most body infections.

Diflucan in Blood

After the last dose, Diflucan can be easily detected in the bloodstream for about 5 to 10 days.

Skin and Nails

Due to its deep penetration to the tissues, Fluconazole stays in the skin for about 7 days. Because nails grow slower than skin, Diflucan  may remain in nail tissues for longer.

Vaginal Tissue

The antifungal effect in vaginal tissues of Diflucan may last 72 hours, but the medication may continue to act for a longer time.

Urine

The majority of Diflucan is eliminated unchanged via urine and about 80% of the drug untreated is eliminated. Fluconazole can be detected in urine for about 5 to 10 days.

Factors That Affect How Long Fluconazole Stays in Your System

There are a number of factors that can affect how it is eliminated from your body.

Dosage

People who take generic version of Diflucan in a single dose as a treatment will have Fluconazole eliminated from their bodies faster than patients who take higher and repeated doses of this drug

Kidney Function

Since Fluconazole is eliminated mainly via urine, how well your kidneys function can affect Fluconazole elimination from your body.

Liver Function

How the liver processes Fluconazole can also affect how Fluconazole is eliminated from the body.

Age and Metabolism

How quickly Diflucan is metabolically processed can vary based on age and individual metabolic speed.

Fluconazole and Alcohol Interaction

The most common question regarding Fluconazole is its compatibility with alcohol.

Having alcohol and Diflucan in the body at the same does not stop the medicine from functioning. Though via the overlap of the substances, Fluconazole interacts and exacerbates:

• headache
• nausea
• dizziness
• upset stomach
• distress to the liver

Excessive consumption can weaken the body’s defense mechanism to allow yeast infections to worsen as Fluconazole is intended to manage. When on Fluconazole 150 mg, alcohol use is discouraged for the added concern of Fluconazole already has its interaction with the liver.

Diflucan and Medication Interactions

It interacts with various prescriptions in the body to increase the potential for adverse effects.

Sildenafil Tablets Interaction

It can increase the concentration of Sildenafil within the body which can introduce the following adverse effects:

• hypotension
• headache
• Flushing
• visual disturbance
• dizziness

Be sure to contact your healthcare provider when considering this drug in conjunction with Erectile Dysfunction medicines.

Common Fluconazole Side Effects

Adverse effects of this drug are common, yet mild in nature.

some of these effects are:

• headache
• nausea
• vomiting.
• pain
• upset stomach
• dizziness.

Severe adverse reactions require an immediate response to your healthcare provider.

When Should You Contact a Doctor?

The following reactions require an immediate response:

• respiratory difficulties
• severe rash
• swelling of the tongue and/or face
• jaundice of the skin and/or sclera
• ventricular arrhythmia
• severe dizziness
• seizures.

These effects indicate an adverse reaction to this medication.

Can You Drink Alcohol 2 Days After Taking Fluconazole?

Since Diflucan can stay active within your system for days, alcohol can still interfere with this drug even 48 hours after your last dose. Health practitioners encourage not drinking alcohol at least until this medicine is almost completely out of the body.

Final Thoughts

For how long does Fluconazole stay in your system? In general, it is in the body for about 5- 6 days after the last dose even though it can take about 10 days to completely flush it out of the system.

Being aware of how Diflucan works, and its interaction with alcohol, will help you use this drug in the safest and the most effective way possible.