Zaditor (Ketotifen) Medication


Zaditor (Ketotifen)

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The drug under consideration is indicated for the prophylaxis and management of ocular pruritus resulting from allergies, including allergic or seasonal conjunctivitis. Ketotifen is an ocular antihistamine that modulates allergic manifestations by selectively antagonizing histamine, a naturally occurring substance. Moreover, it acts as a mast cell stabilizer, curbing the release of endogenous compounds that elicit an allergic response. 

Uses and Dosage 

Zaditor is a medication utilized in the treatment of Allergic Conjunctivitis and may be used alone or in combination with other drugs. This medication belongs to the class of Antihistamines, Ophthalmic, which acts to alleviate symptoms by blocking histamine release. 

The dosage of Zaditor is contingent upon individual medical needs and response to treatment. The recommended dose is one drop in the affected eye(s), administered twice daily, with an interval of 8 to 12 hours, per package instructions or as directed by a healthcare professional. 

To apply eye drops, first, wash hands thoroughly to prevent contamination. To avoid further contamination, do not touch the dropper tip or allow it to come into contact with the eye or any other surface. 

To administer the medication:

  1. Tilt the head back, gaze upward, and pull down the lower eyelid to form a small pouch.
  2. Place the dropper directly over the eye and apply one drop to the lower eyelid.
  3. Afterward, look downwards and gently close the eye for 1 to 2 minutes, exerting slight pressure at the corner of the eye near the nose. This will prevent the medication from draining out and ensure maximum efficacy. Avoid rubbing the eye and refrain from blinking during this time. 

After use, the dropper cap should be replaced, and the bottle should be tightly closed, without rinsing the dropper. 

Side Effects 

Common Side Effects

Possible adverse effects of using this medication include:  

  • Burning or stinging sensation 
  • Eye irritation 
  • Headache 
  • Nasal congestion 
  • Runny nose 
  • Bad taste in the mouth 
  • Heightened sensitivity to light 

If any of these symptoms persist or worsen, inform your doctor or pharmacist. 

Severe Side Effects

Keep in mind that if your physician has prescribed this medication, they have determined that the advantages of using it outweigh the risks of potential side effects. In general, most individuals who use this medication do not experience severe adverse effects. 

However, notify your doctor immediately if you experience any serious side effects, such as:  

  • Dryness of the eyes 
  • Eye discomfort 
  • Increased redness 
  • Swelling of the eye 
  • Vision issues 

This list is not exhaustive, and if you notice any other symptoms not mentioned above, please consult your doctor or pharmacist. 


Prior to using ketotifen, inform your physician or pharmacist if you have any known allergies to it or any other substances. This medication may contain inactive ingredients, including benzalkonium chloride, which is a preservative found in the multi-dose container and may cause allergic reactions or other complications. speak with your pharmacist for additional information. 

Before using this medication, disclose your medical history to your doctor or pharmacist, particularly if you have any eye issues, such as glaucoma. 

Additional information

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Quality Prescription Drugs has provided information from third parties intended to increase awareness and does not contain all the information about Zaditor (Ketotifen). Talk to your doctor or a qualified medical practitioner for medical attention, advice, or if you have any concerns about Zaditor (Ketotifen).