Zaditor Side Effects
Generic Name: ketotifen ophthalmic
Note: This page contains side effects data for the generic drug ketotifen ophthalmic. It is possible that some of the dosage forms included below may not apply to the brand name Zaditor.
It is possible that some side effects of Zaditor may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.
For the Consumer
Applies to ketotifen ophthalmic: oral syrup, oral tablet
Other dosage forms:
As well as its needed effects, ketotifen ophthalmic (the active ingredient contained in Zaditor) may cause unwanted side effects that require medical attention.
If any of the following side effects occur while taking ketotifen ophthalmic, check with your doctor or nurse as soon as possible:Less common
- general feeling of discomfort or illness
- joint pain
- loss of appetite
- muscle aches and pains
- runny nose
- sore throat
- trouble sleeping
- unusual tiredness or weakness
- Abdominal or stomach pain
- blistering, itching, peeling, or redness of skin
- bloody or cloudy urine
- clay-colored stools
- dark urine
- difficult, burning, or painful urination
- frequent urge to urinate
- muscle spasm or jerking of all extremities
- sudden loss of consciousness
- unpleasant breath odor
- vomiting of blood
- yellow eyes or skin
If any of the following symptoms of overdose occur while taking ketotifen ophthalmic, get emergency help immediately:
- Blurred vision
- drowsiness (severe)
- faintness or lightheadedness when getting up from a lying or sitting position
- fast, pounding, or irregular heartbeat or pulse
- loss of consciousness
- unusual tiredness or weakness
Some ketotifen ophthalmic side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:More common
- Weight gain
- Bloody nose
- dryness of mouth
- increased appetite
- swelling of eyelids
- unexplained nosebleeds
For Healthcare Professionals
Applies to ketotifen ophthalmic: ophthalmic solution
Ocular side effects have included conjunctival congestion (10% to 25%). There was a significant underlying incidence of conjunctival congestion among treated patients and a causal relationship with use of ketotifen has not been established. Other ocular side effects have included burning or stinging, conjunctivitis, ocular discharge, dry eyes, eyelid disorder, eye pain, itching, keratitis, lacrimation disorder, mydriasis, photophobia, and local rash (< 5%).
Ketotifen instillation was associated with mild to moderate burning or stinging in 98% of patients (n=35) in one trial.
Nervous system side effects including headache have been reported in up to 25% of patients. However, there has been no distinction between headache due to underlying disease and use of the drug such that a causal relationship has been questioned. Headaches associated with the use of this product have generally been mild.
Respiratory side effects have included rhinitis (25%). Other respiratory side effects have included pharyngitis (5%).
General side effects have included flu syndrome (5%).
More about Zaditor (ketotifen ophthalmic)
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