Bee Sting: Benadryl (Diphenhydramine) is good.

For those in The USA, please order the aware in care kit. No charge to those with a Dx of Parkinson's. http://www.awareincare.org/

There is also a medicine fact sheet on recommended/not recommended. Drug names are for North America, but still not a bad idea to review else where. It was interesting to note some drugs cause other issues, like blocking levadopa uptake.