Fluconazole was patented in 1981 by Pfizer and introduced to the market in 1988. This triazole antifungal became a key innovation, offering strong effectiveness and a better safety profile compared to earlier antifungal agents.

It received U.S. FDA approval in 1990 for treating various fungal infections, such as vaginal candidiasis, oral and oesophagal thrush, and systemic candidiasis. Over time, Fluconazole has been included in the WHO’s List of Essential Medicines, reflecting its importance in global healthcare.

Fluconazole is used to treat:

• Vaginal yeast infections

• Oral thrush (mouth infections)

• Oesophageal fungal infections

• Systemic fungal infections (affecting organs like the lungs, brain, or bloodstream)

Fluconazole works by inhibiting the growth and spread of the fungus. It blocks a special substance inside the fungus that helps make its protective outer layer (cell membrane). Without this layer, the fungus becomes weak and is unable to survive. This helps the body eliminate the infection. Fluconazole is safe for humans because our cells do not need this substance, so it targets only the fungus without harming your body.

Fluconazole tablets are taken orally with a glass of water. You can take the tablet with or without food, depending on your preference. It is important to follow your doctor’s instructions exactly, including the correct dose and treatment duration. You should always complete the full course of medication, even if you start to feel better, to ensure the infection is fully treated.

Fluconazole is available in several dosage strengths, including 50 mg, 100 mg, 150 mg, and 200 mg tablets. The 50 mg dose is usually prescribed for mild infections or daily use. The 100 mg and 200 mg doses are often used for more serious or long-term fungal infections. The 150 mg tablet is commonly given as a single dose for treating vaginal yeast infections. In hospitals, higher doses like 400 mg may be used for severe systemic fungal infections.

The exact dosage and length of treatment will depend on the type of infection, its severity, and your age or health condition. For children, doctors usually calculate the dose based on body weight. Always consult your doctor before starting Fluconazole and do not change your dose without medical advice.

Common (usually mild and temporary):

• Nausea or upset stomach

• Headache

• Dizziness

• Diarrhea

• Skin rash (mild)

• Changes in taste

• Mild abdominal pain

Serious (less common, seek medical help):

• Severe skin reactions like blistering or peeling skin (Stevens-Johnson syndrome)

• Yellowing of the skin or eyes (jaundice), which may indicate liver problems

• Dark urine or pale stools, signs of liver issues

• Severe allergic reactions: swelling of the face, lips, tongue, or difficulty breathing

• Seizures (very rare)

• Irregular heartbeat (QT prolongation)

• Severe fatigue or unusual bruising (possible blood-related effects)

Most people tolerate the medicine well, but any unexpected or worsening symptoms should be reported right away.

•  Inform your doctor if you have liver problems, kidney disease, or heart rhythm issues (QT prolongation).

•  Do not use during pregnancy unless prescribed, especially at high doses, due to the potential risk to the baby.

•  Breastfeeding women should consult a doctor before use.

•  May cause dizziness — avoid driving or using heavy machinery if you feel lightheaded.

•  Long-term use may require regular liver function tests.

•  Avoid alcohol during treatment to lower the risk of liver side effects.

•  Inform your doctor about any history of liver, kidney, or heart conditions before starting the medicine.

•  Pregnant or breastfeeding women should use Fluconazole only if advised by a doctor.

•  Avoid alcohol during treatment to reduce liver strain.

•  Monitor for side effects like rash, yellowing of the skin, or unusual tiredness, and report them immediately to your doctor.

•  If you experience dizziness, avoid driving or using heavy machinery until you feel normal.

•  For children or elderly patients, doses should be adjusted by the doctor as needed.

• Take the tablet exactly as prescribed by your doctor; do not skip doses and always complete the full course.

•  It can be taken with or without food, but if you feel nauseous, taking it with food may help.

• Fluconazole can interact with other medicines like blood thinners, diabetes medicines, and some antibiotics. Always share your full medication list with your doctor.

•  Inform your doctor if you are pregnant, breastfeeding, or planning to conceive before starting the medicine.

•  For vaginal yeast infections, symptoms may improve within 1–3 days; however, completing the full dose is essential for a complete recovery.
  

1. Ameish Govindarajan; Karlyle G. Bistas; Curtis J. Ingold; Preeti Patel; Ayham Aboeedhttps://www.ncbi.nlm.nih.gov/books/NBK537158/

2. KD Tripathi, Essentials of Medical Pharmacology, Antifungal drugs, 7th edition, 2013, 787-788.

3. Pharmacokinetics of Fluconazole tablets administered to healthy subjects Afaq Mahde Ammoo1 , Duaa Jaafar Jaber Al-Tamimi2 , Mustafa Ihssan Abbas Al-Mahroos3 , Mariam Jaafar Jaber Al-Tamimi2 , Jaafar Jaber Ibraheem4 https://japer.in/storage/files/article/6e0bd7b5-1936-4067-9b78-3ac3c7d1325a-2zhkATsreYZhF2IM/japer-vol-11-iss-2-92-99-8012.pdf

4. Journal for Research in Applied Sciences and Biotechnology 2(3):41-43   DOI:10.55544/jrasb.2.3.6   https://www.researchgate.net/publication/371570301_A_Review_on_Fluconazole