How To Give A Cat Benadryl. A dose of benadryl for cats could be given for those bitten by a snake. The max dose for cat pill version is.5 mg per 1 lb of body weight.
The max dose for cat pill version is.5 mg per 1 lb of body weight. (so, 16 lb cat x.5 = 8. There are a couple of ways that you can administer this tablet to them.