Tag: Nasolacrimal duct

An estimated 80% of an administered eye drop may enter the bloodstream through the nasal mucosa, rather than staying in the eye. While antibiotic eye drops are primarily for localized infections, this systemic absorption can, in some rare cases, lead to side effects like feeling sick.

According to research and clinical case reports, it is possible for eye drops to cause coughing, a surprising side effect that can occur when the medication is absorbed systemically rather than remaining in the eye. This happens because the medication can drain from the eye, travel down the nasolacrimal duct, and enter the throat and bloodstream. While most side effects are localized, certain powerful medications used for conditions like glaucoma can lead to this unexpected respiratory symptom.

It is estimated that up to 80% of an eye drop can be absorbed systemically through the nasal mucosa after drainage. This anatomical fact explains the unexpected connection between your eyes and your sinuses, raising the important question: 'Can eye drops cause sinus problems?'. Yes, they can, due to this efficient drainage system.

Less than 5% of a topically applied eye drop's medication penetrates the cornea, while a substantial amount is absorbed into the systemic circulation. Learning **how to avoid systemic absorption of eye drops?** is a critical skill for maximizing therapeutic effect in the eye while minimizing unwanted side effects throughout the body.

A single oversized eyedrop contains more fluid than your eye can hold, with the excess draining away [1.4.5, 1.5.2]. This drainage is the primary reason you might ask, 'Can I taste my eyedrops?' after applying them.