here is some info for you to read:
The following quotes are all from the American Veterinary Medical
Association:
http://www.avma.org/pubhlth/poisgde.asp#drugs
"Animal poisoning by drugs is by far the most common type of small
animal poison exposure, accounting for 75% of 1990 toxin exposures as
reported by the AAPCC and 82 of 425 fatalities."
ACETAMINOPHEN (Tylenol)
"Dogs (particularly small dogs) are also susceptible to significant
tissue damage from as little as two regular strength Tylenol and
repeated doses increase the risk significantly. Signs develop quickly
and can include salivation, vomiting, weakness and abdominal pain."
"Due to the significant toxicity to pets in relatively minimal
dosages, the recommendation is clear — Tylenol should not be given to
dogs or cats. "
ASPIRIN, IBUPROFEN, PHENYLBUTAZONE, NAPROXEN (NSAID toxicity)
"...NSAID's (non-steroidal anti-inflammatory drugs) and are widely
prescribed with caution by veterinarians to relieve pain from
arthritis and other conditions. Animal dosages, however, are much
lower than human dosages. Use of NSAID's can significantly increase
the risk for development of stomach or intestinal ulcers, particularly
in a sick patient, or one receiving other medications... Two regular
strength aspirin in a small dog can cause clinical signs of
poisoning..."
"Any medications need to be discussed with and prescribed by a
veterinarian prior to giving them to your pet to avoid an inadvertent
and tragic poisoning."
but you guys decide. i personally do NOT give Tylenol, but rather buffered baby aspirin.