Doctors may prescribe the drug sold under the brand name Pataday in the United States for people who suffer from allergic conjunctivitis, MayoClinic.com reports. The medication, known by the generic name olopatadine, prevents an allergic reaction in the person's eyes by altering a substance release, the organization states. Pataday is administered as eye drops and available only via prescription. It can produce some side effects, although serious side effects have not been reported.
Pain
Pataday can induce some pain in the person's body. This can occur particularly at the start of the medication's use, Drugs.com indicates. Pain may occur as a minor headache. It also may occur as pain in the person's eyes. This may manifest as a burning sensation or a feeling of stinging. The person also may experience throat soreness. Because these side effects, when they occur at all, classify as non-serious, physicians expect the person's body to adjust to the medication and eradicate the side effects. Severe or persistent pain should be reported to the doctor.
Nasal Problems
The person using Pataday may develop some temporary nasal problems as side effects of the drug. For example, the patient may develop rhinitis, the medical term for a runny nose. The medicine also may cause the person's nasal passages to become congested, MayoClinic.com reports. Both of these problems should cease without medical intercession.
Blurry Vision
MedlinePlus reports that apply the Pataday eye drops can cause the person's eyesight to become blurry. This side effect, which can affect either near or far vision, typically ends without a doctor's aid, but MedlinePlus recommends questioning the physician about if it continues. If it occurs severely, the person also should consult the doctor.
Bodily Weakness
The introduction of Pataday into a person's body may cause the non-serious but disconcerting side effect of bodily weakness. The medication may make the person feel as though she is fatigued from strenuous work or exercise, even if such activities have not taken place. This may feel like tiredness or physical exhaustion. Drugs.com reports weakness as a common side effect of Pataday and indicates that typically it ends on its own without medical intervention. If it continues, she should query the doctor about it.
