Posaconazole Eye Medicine: Uses, Brands & Dosage

Posaconazole is an antifungal medicine used to treat specific severe or resistant fungal infections of the eye and surrounding areas.

Drug class	Antifungal
Type	Single
Forms	Tablet / Suspension
Common strength	100 mg / 300 mg
Common Indian brands	Noxafil
Prescription status	Prescription

What Posaconazole is used for

Posaconazole is a powerful antifungal medicine prescribed by eye specialists at Pristine Eye Hospitals for certain serious fungal infections. It is used when other treatments haven’t worked or in very severe cases.

Refractory Fungal Keratitis: This is a severe infection of the cornea (the clear front part of your eye) caused by fungi. ‘Refractory’ means it hasn’t responded to standard treatments. Posaconazole is used in such challenging cases to help clear the infection.
Rhino-orbital Mucormycosis (step-down therapy): This is a very serious fungal infection that can affect the nose, sinuses, and eye socket. Posaconazole is used as a ‘step-down’ therapy, meaning it’s given after initial, more intensive treatments have stabilised the condition. It helps to continue fighting the infection and prevent its return.

Your doctor will decide if Posaconazole is the right treatment for your specific condition based on the severity and type of fungal infection.

How it works

Posaconazole belongs to a group of medicines called antifungals. It works by stopping the growth of fungi that cause infections. It is a ‘broad-spectrum triazole,’ which means it is effective against a wide range of fungi, including difficult-to-treat moulds like Mucor, which can cause very serious infections.

By preventing these fungi from growing and multiplying, Posaconazole helps your body clear the infection and allows the affected tissues to heal. It’s a powerful medicine used for severe or resistant fungal infections where other treatments might not be effective.

How it’s used

Posaconazole is available as a tablet or an oral suspension. It is a systemic antifungal, meaning it works throughout your body to fight the infection. It is crucial to take this medicine exactly as prescribed by your treating team at Pristine Eye Hospitals.

The dosage and duration of treatment will be carefully determined by your doctor based on your specific condition, the type of infection, and your overall health. Do not change your dose or stop taking the medicine without consulting your doctor, even if you start to feel better. Stopping early can lead to the infection returning or becoming harder to treat.

Your doctor will provide detailed instructions on how to take the tablets or suspension, including whether to take it with or without food. It is very important to follow these instructions precisely to ensure the medicine works effectively and safely.

Always follow your ophthalmologist’s exact instructions.

Brands available in India

Noxafil

Brand availability and pricing vary; confirm with your pharmacist.

Please note

Systemic antifungal requiring liver-function monitoring and with many drug interactions. Report any yellowing of the eyes/skin or visual disturbance. Prescription and supervision required.

Precautions & side effects

Posaconazole is a powerful medicine and requires careful monitoring and supervision. Here are some important precautions:

Prescription and Supervision: This medicine is only available with a prescription and must be used under the strict supervision of your doctor. Do not self-medicate.
Liver Function Monitoring: Posaconazole is a systemic antifungal that requires regular monitoring of your liver function. Your doctor will arrange for blood tests to check your liver health before and during treatment.
Drug Interactions: Posaconazole can interact with many other medicines. It is crucial to inform your doctor about ALL medicines you are currently taking, including over-the-counter drugs, herbal supplements, and vitamins, to avoid potential harmful interactions.
Report Side Effects: It is very important to report any new or worsening symptoms to your doctor immediately. Specifically, report any yellowing of the eyes or skin (jaundice), dark urine, pale stools, unusual tiredness, nausea, vomiting, or any visual disturbances. These could be signs of serious side effects.
Cost: Posaconazole can be an expensive medicine. Your doctor will discuss the treatment plan and costs with you.
Used in Resistant/Severe Cases: This medicine is typically reserved for resistant or severe systemic fungal diseases due to its potency and potential side effects.

Always communicate openly with your doctor about any concerns or changes in your health while taking Posaconazole.

Understanding Fungal Eye Infections

Fungal eye infections, such as fungal keratitis or rhino-orbital mucormycosis, can be serious conditions that affect the eye and surrounding tissues. These infections are caused by various types of fungi and can sometimes be challenging to treat, especially if they are severe or do not respond to initial treatments. Fungal keratitis, for instance, is an infection of the cornea – the clear, dome-shaped front surface of your eye. If left untreated or inadequately treated, it can lead to significant vision loss. Rhino-orbital mucormycosis is an even more aggressive infection that can spread rapidly from the nose and sinuses to the eye socket, potentially causing severe damage and even being life-threatening. Symptoms of fungal eye infections can vary but often include redness, pain, blurred vision, discharge from the eye, sensitivity to light, and a feeling that something is in your eye. In cases of rhino-orbital mucormycosis, there might also be facial pain, swelling, and blackish discoloration around the nose or eyes. Early diagnosis and appropriate treatment are crucial to preserve vision and prevent the spread of the infection. At Pristine Eye Hospitals, our specialists are equipped to diagnose and manage these complex conditions, using advanced medicines like Posaconazole when necessary to provide the best possible outcome for our patients.

General Advice for Taking Oral Medicines for Eye Conditions

When you are prescribed an oral medicine like Posaconazole for an eye condition, it’s important to understand that it works throughout your body to reach the site of infection in your eye. Here are some general tips to ensure you take your medicine correctly and safely:

Follow Instructions Carefully: Always take your medicine exactly as prescribed by your doctor. Pay attention to the dose, frequency (how many times a day), and whether it should be taken with or without food. If you are unsure, always ask your doctor or pharmacist.
Consistency is Key: Try to take your medicine at the same time(s) each day. This helps maintain a steady level of the drug in your body, which is important for its effectiveness.
Do Not Miss Doses: If you miss a dose, take it as soon as you remember, unless it’s almost time for your next dose. In that case, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for a missed one.
Complete the Full Course: Even if your symptoms improve and you start feeling better, it is vital to complete the entire course of medicine as prescribed. Stopping treatment early can lead to the infection returning and potentially becoming more difficult to treat.
Storage: Store your medicine as directed on the packaging, usually in a cool, dry place, away from direct sunlight and out of reach of children.
Hydration: Drink plenty of water unless advised otherwise by your doctor.

When to Seek Medical Help

While taking any medicine, it’s important to be aware of your body and report any unusual symptoms. For Posaconazole, specifically, you must be vigilant for certain signs. If you experience any yellowing of your eyes or skin (jaundice), dark urine, pale stools, severe nausea or vomiting, unusual tiredness, or any new or worsening visual disturbances, contact Pristine Eye Hospitals or your treating doctor immediately. These could be signs of serious side effects that require urgent medical attention. Additionally, if your original eye symptoms worsen, if you develop new symptoms, or if you have any concerns about your treatment, do not hesitate to reach out to your healthcare team. Your doctor is your best resource for any questions or worries you may have during your treatment journey. Always keep your follow-up appointments, as these are crucial for monitoring your progress and ensuring the medicine is working effectively and safely.

Frequently asked questions

What is Posaconazole used for?

Posaconazole is an antifungal medicine used to treat specific severe or resistant fungal infections of the eye and surrounding areas. This includes refractory fungal keratitis (a severe eye infection not responding to other treatments) and as step-down therapy for rhino-orbital mucormycosis (a serious fungal infection affecting the nose, sinuses, and eye socket).

How does Posaconazole work?

Posaconazole is a broad-spectrum antifungal medicine that works by stopping the growth of various fungi, including difficult-to-treat moulds like Mucor. By preventing these fungi from multiplying, it helps your body clear the infection and allows the affected tissues to heal.

What are the common Indian brands for Posaconazole?

In India, Posaconazole is available under the brand name Noxafil.

How is Posaconazole used?

Posaconazole is available as a tablet or an oral suspension. It is a systemic medicine, meaning it works throughout your body. You must take it exactly as prescribed by your doctor, following their instructions regarding dosage, frequency, and whether to take it with or without food. Do not stop taking it without consulting your doctor.

Do I need a prescription for Posaconazole?

Yes, Posaconazole is a prescription-only medicine. It requires a doctor's prescription and strict medical supervision due to its potency and potential side effects.

What are the key precautions to take while using Posaconazole?

Key precautions include the need for regular liver function monitoring through blood tests, informing your doctor about all other medicines you are taking due to many potential drug interactions, and immediately reporting any yellowing of the eyes/skin or visual disturbances to your doctor. It is also an expensive medicine and is used in resistant or severe fungal diseases.

References

Medically reviewed by Dr. C Jagadesh Reddy, Chief Surgeon: Cornea, Cataract and Refractive Surgery — last reviewed 2026-07-28.

This page is for general education only and is not a substitute for professional medical advice, diagnosis or treatment. Never self-medicate or reuse an old prescription. Always consult a qualified ophthalmologist before starting, changing or stopping any eye medicine.