What are eyedrops?

Eyedrops contain medicines that are used to treat many eye diseases and conditions. Some are also helpful for relieving eye discomfort.

It is important to remember that all medicines, including eyedrops, can cause side effects. Some side effects caused by eyedrops are local, which means they affect just the eyes. Examples of local side effects include redness of the eye, eye irritation or blurred vision.

Most of the medication in eyedrops stays in or near the eyes, but a small amount affects the rest of the body. Eyedrops are absorbed into the body’s bloodstream through mucous membranes lining the surface of the eye, the tear drainage system, and nose. Once in your bloodstream, the eyedrops can cause side effects in other parts of the body. Such side effects can include slow heart rate, dizziness and headache. In general, however, there is less risk of side effects with eyedrops than with oral medicines.