Tasting eye drops after application is a common experience. This article explains why it happens and offers practical ways to minimize the sensation.
The Eye-Nose-Throat Connection
The sensation of tasting eye drops comes from the nasolacrimal drainage system, an anatomical connection between the eyes, nose, and throat. This system drains tears from the eye’s surface into the nasal cavity. Any liquid applied to the eye enters this pathway through tiny openings called puncta, located in the inner corner of the eyelids.
From the puncta, the fluid travels through small canals, called canaliculi, which typically join before draining into the lacrimal sac, a reservoir near the nose. The lacrimal sac then funnels the fluid into the nasolacrimal duct.
This duct ultimately empties into the nasal cavity. Once there, the liquid mixes with mucus and flows down the back of the throat, where taste receptors detect its presence. This pathway also explains why crying can lead to a runny nose, as excess tears drain through the same system.
Factors Influencing the Taste
Several elements influence the taste of eye drops. The chemical composition, including active medicinal ingredients, often has distinct flavors. Preservatives like benzalkonium chloride, excipients (inactive ingredients), and the solution’s pH can also contribute to or modify the taste.
The concentration of active ingredients directly impacts taste strength; higher concentrations lead to a more noticeable flavor. The volume of drops administered also influences drainage into the throat, making the taste more pronounced with larger volumes.
Is It A Concern?
For most eye drops, tasting them after application is a common and harmless side effect. It simply indicates the nasolacrimal drainage system is functioning, allowing fluid to travel from the eye to the throat. This sensation does not typically signify medical danger or an adverse reaction.
However, certain situations warrant attention. If the taste is accompanied by unusual symptoms like severe nausea, dizziness, or blurred vision, it could indicate a more significant issue. An extremely bitter or metallic taste, especially from a medication with systemic effects, might suggest higher absorption into the bloodstream. Signs of an allergic reaction, such as swelling, itching, or difficulty breathing, alongside the taste, require immediate medical consultation. Consult a healthcare professional if symptoms persist, worsen, or if you have concerns about the medication.
Strategies to Reduce the Taste
Several techniques can help minimize or prevent the taste of eye drops. One effective method is punctual occlusion: applying gentle pressure to the inner corner of the eye, near the nose, immediately after instilling the drops. Maintain this pressure for one to two minutes to close off the puncta and prevent drops from entering the tear drainage system.
Another strategy is to gently close the eyes for a minute or two after application without vigorous blinking. Blinking can pump drops into the drainage system, so gentle closure allows absorption. Blotting any excess liquid with a clean tissue prevents it from entering the puncta. Using only the recommended amount of drops also reduces drainage. After application, drinking water or gargling can help clear any lingering taste.