ABC News is reporting that a California man is now in jail after attempting to poison his girlfriend with Visine eye drops. The man allegedly put eye drops into the woman’s drink in order to make her sick.

According to the report, the 27-year-old man, Shayne Carpenter, was arrested last week on charges of poisoning and domestic violence. Carpenter’s girlfriend reportedly found texts on the man’s phone that referenced the poisoning and called police. The police had Carpenter’s girlfriend speak to him over the phone and were able to obtain an admission from Carpenter.

Eye drops, such as Visine, and some nasal sprays contain Tetrahydrozoline, which can be poisonous when swallowed. Symptoms of Tetrahydrozoline poisoning can include difficulty breathing, blurred vision, rapid heartbeat, nausea, headaches, and vomiting.