Eye Drops In Drinks: What's The Effect?

Leana Rogers Salamah

-Nov 1, 2025

It might sound like a plot from a suspense movie, but the question of what happens when eye drops are mixed into a drink is one that carries real-world implications. This article dives into the potential consequences, both from a chemical and physiological perspective, of ingesting eye drops.

What Are Eye Drops Made Of?

Before we explore the effects, it's crucial to understand what constitutes eye drops. Eye drops aren't a single, uniform solution; their ingredients vary widely depending on their purpose. Some common types include: — Find Your Dream Job: Buffalo, MN Career Guide

Lubricant Eye Drops: These usually contain ingredients like glycerin or carboxymethylcellulose, which mimic natural tears to soothe dry eyes.
Decongestant Eye Drops: These often contain tetrahydrozoline or naphazoline, which narrow blood vessels in the eye to reduce redness.
Antihistamine Eye Drops: Used for allergy relief, these contain antihistamines like olopatadine to block histamine and reduce itching.
Prescription Eye Drops: This category includes a wide array of medications, such as those for glaucoma (like latanoprost) or infections (antibiotics or antivirals).

The potential danger of ingesting eye drops largely depends on these active ingredients.

The Primary Concern: Decongestant Eye Drops

Decongestant eye drops are the most concerning when it comes to ingestion, particularly those containing tetrahydrozoline. This ingredient is an alpha-adrenergic agonist, meaning it affects the adrenergic receptors in the body. When used correctly in the eyes, it constricts blood vessels locally. — Jo Jo White: Celtics Legend & Championship Legacy

However, when ingested, tetrahydrozoline can have systemic effects, impacting the entire body. Some potential consequences include:

Low Blood Pressure (Hypotension): Tetrahydrozoline can significantly lower blood pressure, leading to dizziness, lightheadedness, and even fainting.
Slowed Heart Rate (Bradycardia): It can also slow down the heart rate, which, in conjunction with low blood pressure, can be dangerous.
Central Nervous System Depression: This can manifest as drowsiness, lethargy, and, in severe cases, coma.
Respiratory Issues: Difficulty breathing is another serious potential side effect.
Nausea and Vomiting: The body's reaction to the ingested chemical can include gastrointestinal distress.

Real-World Examples

Unfortunately, there have been cases where tetrahydrozoline-containing eye drops have been intentionally added to drinks, leading to hospitalizations and even legal consequences. These instances highlight the severity of the issue and the importance of understanding the risks.

Expert Insight

"Ingesting even a small amount of tetrahydrozoline can be dangerous, especially for children and individuals with pre-existing heart conditions," says Dr. Sarah Miller, a toxicologist at the National Poison Control Center. "The effects can be rapid and severe, necessitating immediate medical attention."

Other Types of Eye Drops: Are They Safe to Ingest?

While decongestant eye drops pose the most significant risk, other types can also have adverse effects if ingested.

Lubricant Eye Drops: While generally considered safe in small amounts, large quantities can cause diarrhea due to the demulcent additives.
Antihistamine Eye Drops: These can cause drowsiness and dry mouth if ingested.
Prescription Eye Drops: The effects vary widely depending on the medication. Some, like glaucoma medications, can have serious side effects if taken orally without medical supervision.

Why is it Dangerous?

The danger of ingesting eye drops stems from several factors:

Concentration: Eye drops are formulated for topical use, meaning the concentration of active ingredients is designed for the eye, not for systemic absorption.
Systemic Effects: When ingested, these ingredients can be absorbed into the bloodstream, leading to effects throughout the body.
Unpredictability: The severity of the effects can vary depending on the individual's weight, age, pre-existing health conditions, and the amount ingested.

What to Do If Eye Drops Are Ingested

If you suspect that someone has ingested eye drops, immediate action is crucial:

Contact Poison Control: Call the Poison Control Center hotline immediately (1-800-222-1222 in the US). They can provide guidance based on the specific situation.
Seek Medical Attention: Depending on the symptoms and the amount ingested, medical attention may be necessary. Do not hesitate to go to the nearest emergency room.
Provide Information: If possible, have the eye drop bottle available to provide information about the ingredients to medical professionals.

Prevention is Key

The best way to avoid the dangers of eye drop ingestion is prevention:

Store Eye Drops Safely: Keep eye drops out of reach of children and individuals who may intentionally misuse them.
Be Vigilant: Be cautious about accepting drinks from unfamiliar sources.
Educate Others: Share information about the dangers of eye drop ingestion with family and friends.

Conclusion: The Seriousness of Ingesting Eye Drops

Ingesting eye drops, especially decongestant types containing tetrahydrozoline, can have serious and potentially life-threatening consequences. The systemic effects of these medications, when absorbed internally, can disrupt normal bodily functions. Recognizing the risks, knowing what to do in case of ingestion, and taking preventive measures are essential to ensuring safety. — Commanders Vs. Cowboys: Showdown Analysis

Frequently Asked Questions (FAQs)

What is tetrahydrozoline, and why is it dangerous?

Tetrahydrozoline is an alpha-adrenergic agonist found in decongestant eye drops. It narrows blood vessels in the eyes to reduce redness, but when ingested, it can cause low blood pressure, slowed heart rate, central nervous system depression, and respiratory issues.
How much tetrahydrozoline is dangerous?

Even small amounts of tetrahydrozoline can be dangerous, especially for children. As little as 1-2 milliliters can cause significant symptoms. It is crucial to seek immediate medical attention if any amount is ingested.
What are the symptoms of tetrahydrozoline poisoning?

Symptoms of tetrahydrozoline poisoning include low blood pressure, slowed heart rate, drowsiness, lethargy, difficulty breathing, nausea, and vomiting. In severe cases, it can lead to coma.
Can other types of eye drops be harmful if ingested?

Yes, while decongestant eye drops pose the most significant risk, other types can also cause adverse effects. Lubricant eye drops in large quantities can cause diarrhea, antihistamine eye drops can cause drowsiness and dry mouth, and prescription eye drops can have serious side effects depending on the medication.
What should I do if someone ingests eye drops?

If you suspect someone has ingested eye drops, contact the Poison Control Center immediately at 1-800-222-1222. Depending on the symptoms and the amount ingested, medical attention may be necessary. Do not hesitate to go to the nearest emergency room.
How can I prevent eye drop ingestion?

Store eye drops safely out of reach of children and individuals who may misuse them. Be cautious about accepting drinks from unfamiliar sources and educate others about the dangers of eye drop ingestion.
Are there any long-term effects of ingesting eye drops?

The long-term effects of ingesting eye drops depend on the amount ingested and the individual's overall health. Severe cases can lead to lasting cardiovascular or neurological issues. Medical evaluation and follow-up are essential after an ingestion incident.