Can I Give My Cat Tylenol?

No
Cats cannot metabolize acetaminophen. A single regular-strength tablet can be lethal to a cat.
Source: Pet Poison Helpline
Already ingested? Pet Poison Helpline 855-764-7661

The safe habit

Confirm any medication decision with your veterinarian, who knows your cat's health history and other medications. VetDose shows published reference data, not prescriptions.