Contacid eye drops are used to treat allergies and eye congestion caused by exposure to irritants such as dust, smoke, and pollen. They contain decongestants that help reduce eye redness and swelling of the surface blood vessels, providing a sense of comfort and relieving itching and excessive tearing. These drops should be used according to the doctor's instructions and the recommended daily dose should not be exceeded. Hands should be washed well before use and the tip of the bottle should not touch the eye or any external surface to keep the solution clean. It is not recommended to use them for long periods without consulting a doctor because excessive use may lead to increased sensitivity or dryness. Contacid eye drops are a useful topical treatment for relieving the symptoms of eye congestion associated with allergies.