without knowing anything about this woman it's hard to give advice- is she active? does she eat clean? has she taken fatburners before? i personally wouldnt recommend Clen to anyone who doesn't have a good knowledge base of working out and dieting. as with any supplement, you should start with the smallest effective dose. 40mcg pills might be too much for her, especially since Clen tends to give jitters and headaches...
~MINX