The following drug is not helpful in the treatment of ectopic pregnancy:
Misoprostol (PGE1) has been used for cervical ripening which is used for induction of labour. It doesn't have any role in management of ectopic pregnancy. Ref:Text Book of Obstetrics By Dutta, 6th Edition, Pages 175, 189, 505
Methotrexate
Misoprostol
Actinomycin-D
RU486