Natamycin Ophthalmic

Natamycin Ophthalmic is a prescription medication used for the treatment of fungal keratitis and fungal blepharitis/conjunctivitis. 

• Natamycin Ophthalmic is available under the following different brand names: Natacyn.

Common side effects of Natamycin Ophthalmic include:

• Tearing,
• Watery eyes, and
• Feeling like something is in the eye.

Serious side effects of Natamycin Ophthalmic include:

• Hives,
• Difficulty breathing,
• Swelling of the face, lips, tongue, or throat,
• Vision changes,
• Eye redness or irritation,
• Swelling of the eye,
• Eye pain or numbness, and
• Chest pain

Rare side effects of Natamycin Ophthalmic include:

• None 

Seek medical care or call 911 at once if you have the following serious side effects:

• Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors;
• Serious eye symptoms such as sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights;
• Serious heart symptoms include fast, irregular, or pounding heartbeats; fluttering in the chest; shortness of breath; sudden dizziness, lightheadedness, or passing out. 

This is not a complete list of side effects and other serious side effects or health problems that may occur because of the use of this drug. Call your doctor for medical advice about serious side effects or adverse reactions. You may report side effects or health problems to FDA at 1-800-FDA-1088.

Adult dosage

Ophthalmic suspension

• 5%

Fungal Keratitis

Adult dosage

• 1 drop in conjunctival sac every 1-2 hours
• May decrease to 1 drop 6-8 times/day after 3-4 days.
• Continue for 14-21 days until the infection is eradicated.

Fungal Blepharitis/Conjunctivitis

Adult dosage

• 1 drop in a conjunctival sac 4-6 times/day

Dosage Considerations – Should be Given as Follows: 

• See “Dosages”