other herbalists told me sap from the fruits is safe to use... i personally wasn't sure about the scopelamine content in sap from the fruits, so i did some checking out. the scopelamine content in fruits is lower but it still can be dangerous for woman ( less body weight etc ) if you apply too much.

too much scopelamine can penetrate through the skin and cause scopelamine poisoning.... use with care
Datura stramonium contains least scopelamine from all dature species...