Have taken Necon for 15yrs. Tried Nortrel when Necon not available and had terrible double vision,severe vascular type headache. Discontinued immediately! resumed Necon when it became available. Now pharmacy only able to get Cyclafem to sub for Necon. Very anxious that I will have " vascular" reaction again. I do not have hypertension, do have occasional migraines, am age 30. I use Necon for control of pms,menorraghia, dysmenorrhea not for contraception. Please help.