Natacyn (Natamycin) 5% Eye Suspension

Natacyn (Natamycin) 5% Eye Suspension is an oral suspension with Natamycin 5% w/v declared as its active content. It is supplied in a pack size of 15ml.

This is a non-prescription product and can be purchased without a prescription. Only product, safety and handling details are published on this page.

An online consultation with a DoctorOnCall doctor or pharmacist is available for this product, and a registered pharmacist reviews each order before dispatch to Malaysia or Singapore. Follow the directions on the label and on the leaflet inside the pack.

Natacyn must be used exactly as directed by your ophthalmologist, as fungal keratitis treatment schedules are individualised and often intensive in the initial phase. Shake the suspension well before each use. Instil the prescribed number of drops into the affected eye without letting the dropper touch the eye or any surface, and attend all scheduled follow-up examinations so your specialist can monitor the infection’s response to treatment, since fungal infections can be slow to resolve and require careful reassessment.

A commonly used regimen for fungal keratitis is one drop instilled into the conjunctival sac every 1 to 2 hours initially, which may be reduced to one drop 6 to 8 times daily after the first 3 to 4 days as directed by your specialist, with total treatment typically continuing for 2 to 3 weeks or longer depending on clinical response. Dosing and duration must be individualised by your treating doctor based on the severity of the infection and its response to treatment; do not adjust the schedule yourself.

Use before the expiry date printed on the carton and bottle. Once opened, the suspension should generally be used within the timeframe stated by your pharmacist (commonly around 4 weeks), and any change in colour or consistency should prompt you to stop use and check with your pharmacist.

Store in a refrigerator between 2°C and 8°C unless the product information specifies otherwise, and protect from light. Do not freeze. Shake well before use if the suspension has settled, and keep out of the reach and sight of children.

• Known hypersensitivity to natamycin or any component of the suspension
• Should not be used to self-treat a red or painful eye without a confirmed diagnosis, as fungal keratitis requires specific identification and misdiagnosis can delay proper treatment
• Not a substitute for surgical or other specialist interventions that may be needed in severe or non-responding fungal keratitis
• Use with caution and close monitoring in contact lens wearers, and contact lenses should generally not be worn during active treatment

• If other eye medications are prescribed alongside Natacyn (such as additional antimicrobial or antifungal agents), your doctor will specify the order and spacing of administration, generally at least 5 to 10 minutes apart
• Concurrent use of topical corticosteroid eye drops is generally avoided or used only under very close specialist supervision, as steroids may worsen fungal infections
• Inform your specialist of all other eye drops, contact lens solutions, or systemic medicines you are using
• No specific food interactions are known for this topical eye medicine

• Attend every follow-up appointment with your ophthalmologist, as fungal keratitis needs regular clinical reassessment of treatment response
• Shake the bottle well before each use since Natacyn is a suspension, not a clear solution
• Do not stop treatment early even if your eye feels more comfortable, as fungal infections often require prolonged therapy
• Avoid wearing contact lenses during treatment unless your specialist specifically advises otherwise
• Seek urgent review if pain worsens, vision deteriorates, or the eye becomes more red or swollen despite treatment
• Store in the refrigerator and shake well, checking the appearance of the suspension before each use

Fungal keratitis is a serious eye condition that can threaten vision if not properly treated, and confirming the diagnosis often requires specialist examination and sometimes laboratory testing of a corneal sample. Treatment courses with Natacyn are typically longer than for bacterial eye infections, and response is judged clinically by your ophthalmologist over repeated visits rather than by symptom relief alone, since the eye may still be improving even if some discomfort persists. Risk factors for fungal keratitis include eye injury involving plant material or soil, prolonged or improper contact lens wear, and pre-existing corneal disease, so specialist follow-up is essential throughout treatment.