I've never heard of eye drops being able to poison a drink. They are fake tears and drinking an entire bottle of it shouldn't even make you sick.

We are talking about a medication and as such, it can be dangerous if you don't use it according to the safety information. For instance, if it is supposed to be used on your eyes, use it on your eyes. 1) "Eye drops are saline-containing drops used as a vector to administer medication in the eye. Depending on the condition being treated, they may contain steroids (e.g. mydriatics, dexamethasone), antihistamines, sympathomimetics, beta receptor blockers, parasympathomimetics (e.g. pilocarpine), parasympatholytics (e.g. tropicamide or atropine), prostaglandins, non-steroidal anti-inflammatory drugs (NSAIDs) or topical anesthetics. Eye drops sometimes do not have medications in them and are only lubricating and tear-replacing solutions, and they can also contain anti-redness and similar chemicals. One effect of administration of mydriatic eyedrops is intolerance to bright light. Excess and overfrequent application of eyedrops can often discourage the eyes to make tears naturally, resulting in an increasing reliance on them." Source and further information: http://en.wikipedia.org/wiki/Eye_drop Further information: http://en.wikipedia.org/wiki/Artificial_tears - "there are alternatives to preserving eye drops with toxic detergents" http://preservative.free.fr/English/indexen.htm 2) "Phospholine Iodide Eye Drops may be harmful if swallowed. If you or someone you know may have taken Phospholine Iodide Eye Drops by mouth, contact your local poison control center or emergency room immediately." Source and further information: http://www.drugs.com/cdi/phospholine-iodide-eye-drops.html 3) "Will few drops of Visine taken internally cause diarrhea?" false! "While it is true that Visine is readily obtainable (it's an non-prescription eye drop manufactured by pharmaceutical giant Pfizer), a drink spiked with it not only won't produce diarrhea in the one unfortunate enough to drink the concoction, but ingestion of the product is downright dangerous, making this "harmless" form of retaliation fraught with hazard." "If swallowed, get medical help or contact a Poison Control Center right away." Source and further information: http://www.snopes.com/medical/myths/visine.asp 4) "Eye drops are very commonly prescribed but their potential for systemic absorption and serious toxicity may be forgotten. This paper examines patterns of prescription of eye drops in Scotland by general practitioners. A review of the serious systemic features and toxicity, and their management, of commonly used eye drops is undertaken. Practical recommendations for the monitoring of such effects in clinical practice are made." Source and further information: http://www.ncbi.nlm.nih.gov/pubmed/8873311 5) "This medicine may be harmful if swallowed. If swallowing or overdose is suspected, contact your local poison control center or emergency room immediately." Source and further information: "Allergy Relief Eye Drops Opht" http://www.webmd.com/drugs/drug-650-Allergy+Relief+Eye+Drops+Opht.aspx?drugid=650&drugname=Allergy+Relief+Eye+Drops+Opht