Indications 

Pataday (olopatadine) is a highly effective over-the-counter medication used to treat ocular itching and redness caused by allergies. Previously marketed under prescription brands such as Patanol and Pazeo, Pataday is now available without a prescription. 

Pataday (olopatadine) functions by obstructing the production of histamine in the eyes, a chemical compound that triggers symptoms of itching and redness during an allergic reaction. This medication effectively helps alleviate allergy-related symptoms by regulating histamine levels in the eyes. 

Uses and Dosage 

Your physician will advise you on this medication’s appropriate dosage and frequency. You must strictly follow your doctor’s instructions and refrain from exceeding the recommended dosage or frequency. 

If you wear contact lenses, remove them before applying the drops to your eyes. Wait for a minimum of 10 minutes after using the medication before reinserting your contacts. In case your eyes are red, avoid wearing contact lenses. 

Use only the brand of medication prescribed by your physician. Various brands may not produce the same effects. 

The dosage of this medication will vary for individual patients. Crucial to adhere to the instructions provided by your doctor or those printed on the label. The following dosage information pertains only to the average doses of this medication. Do not alter your prescribed dose unless directed by your physician. 

Side Effects 

If you experience any of the following less common side effects, consult your physician immediately: 

• Blurred vision 
• Burning, dryness, or stinging sensation in the eyes 
• Eye redness, irritation, or pain 
• Swelling of the eyelids, face, lips, or feet 
• Difficulty breathing 

Specific side effects of the medication may not require medical attention as they may diminish during treatment as your body becomes accustomed to the drug. Your healthcare provider may offer recommendations to mitigate or minimize these side effects. If any of the following side effects persist, are troublesome, or if you have any concerns, contact your healthcare provider: 

More common: 

• Headache 
• Runny or stuffy nose 
• Sore throat 

Less common: 

• Back pain 
• Body or muscle aches or pain 
• Change in taste 
• Chills 
• Cough 
• Diarrhea 
• Feeling of something in the eye 
• The feeling of discomfort or illness 
• Increased cough 
• Lack or loss of strength 
• Loss of appetite 
• Nausea 
• Pain or tenderness around the eyes and cheekbones 
• Redness of the eye or inside of the eyelid 
• Sensitivity of the eyes to light 
• Shivering 
• Sneezing 
• Sweating 
• Tender, swollen glands in the neck 
• Trouble sleeping 
• Trouble swallowing 
• Unusual tiredness or weakness 
• Voice changes 
• Vomiting 

Caution 

To avoid contamination of the dropper tip and solution, do not touch the eyelids or surrounding areas with the bottle’s dropper tip. Do not wear contact lenses if eyes are red; remove them before applying Pataday. Wait 15 minutes before reinserting the contact lenses. Wait five minutes before using other eye drops, and apply eye ointments afterward. Driving or operating machinery may be affected by the use of Pataday, so wait until your vision is clear before doing so.