Suggest Dosage For Benedryl While Having Itching On The Body

Hi. I m itchy all over forsomeeason, no rash though. I want to take some diphenhydramine hci that I have but there were only a few pills left so I tossed the box in the garbage and now I forgot if I am supposed to take 1 or 2 pills. It s benedryl, each caplet contains 25 mg of diphenhydramine. Can you tell me what the adult dosage is please? I get this itchiness about once to twice a year and asking the benedryl one time usually takes care of it. Ivead his problem for 40 years or so but no doctor knows what it is since my symptoms are only at night, so I have none wen I go see a doctor. I m a female age 54. If you could give me the dosage (1or 2 cap let s) I d be so grateful !! Thanks so much, Debi