Drug Description

Zaditor is belongs to the group of antihistamines and mast cell stabilizers. Its main active components are Ketotifen. Actually, this is a temporary prevention of eye itching caused by allergies. Ketotifen fumarate looks like white crystalline powder. This is a non-prescription drug.


Zaditor is the drug for the treatment and prevention of itching of the eyes resulted from allergies or seasonal conjunctivitis. Ketotifen treats allergic symptoms of the eyes by blocking certain natural substance called histamine and hence is known as antihistamine.
It also reduces the release of certain natural substances that can cause an allergic reaction in the eyes. This drug provides fast and efficient relief from infections or itch. One dosage of Zaditor can last up to 12 hours.


You should apply one drop to the affected eye twice a day or according to the doctor’s prescription. Use Zaditor eye drops with an interval of 8-12 hours.
It is essential to wash your hands thoroughly before allying the eye drops. Never touch the tip of eyedropper to avoid contamination.
The dosage depends on the patient’s age and severity of infection. If you’re using the non-prescription drug, read the instruction thoroughly before using. Ask your physician if contact lens can be used during the treatment with Zaditor. If it’s possible, wait for about 10 minutes to wear on the lenses after using the eye drops.


Follow the above-mentioned precautions to provide the safety of treatment.
Inform your doctor if you’re planning a pregnancy or already are pregnant or breastfeeding.
Tell your doctor if you’re taking any prescription, non-prescription or any herbal supplements.

Adverse effects

Some patients may experience such adverse effects as eye reddening, swelling of eyelids, pain in the eyes, eye infections and itching, blurred vision, tremor, sleeping problems, head pain, lack of appetite, pain in the throat, fatigue, perspiration and joint pain during the treatment. These adverse effects go away within several minutes so you shouldn’t be worry about it.
There are some serious adverse effects like muscle cramps, seizures, burning or pain during urination, sudden fainting and dark stools. You must inform the doctors about the severe adverse effects to avoid complications.

Additional information

If you’re allergic to any component of this eye drops, stop the treatment and talk to your doctor at once.
If you are pregnant, breastfeeding or planning a pregnancy, avoid using this drug as it may cause undesirable consequences. Use Zaditor according to the doctor’s prescriptions to prevent the drug interactions.