Can I Give My Dog Visine?
Cats are different
Do not carry this answer over to your cat: for cats, Redness-relief eye drops (tetrahydrozoline) falls under “do not give at home.” Species handle drugs differently, and the dog answer on this page applies to dogs only.
About Redness-relief eye drops (tetrahydrozoline)
Redness-relief eye drops (tetrahydrozoline) is on the do-not-give list: there is no safe at-home dose. You will see it sold as Visine, and the label strength on the box is what matters for the math, not the brand. Reference data on this page reflects published veterinary sources, not a prescription for your dog.
What to have ready when you call the vet
Whether you are confirming a dose or reporting that your dog already got into something, the call goes faster with four facts ready: your dog's current weight, the exact product name and strength from the label, how much was given or eaten, and roughly when. With those, most clinics can answer in one call.
The safe habit
Confirm any medication decision with your veterinarian, who knows your dog's health history and other medications. VetDose shows published reference data, not prescriptions.