... stop giving it to her and when will she recover from dry mouth. I gave it to her at 6 am and it’s now 4pm and she’s still acting like she has dry mouth. I’ve been giving it to her on and off for the past month and only half of a 25 mg pill. She weighs 35 pounds. But the last week I’ve been giving it to her once a day and giving her a whole pill. I finally figured out it was the Benadryl when I looked up side affects.