To 40 times the daily maximum recommended human dose on mg m2 basis for up to years also produced an increase in the incidence of benign ovarian stromal tumors at 10 mg kg day. We comply with the HONcode standard for trustworthy health information. Femara side effects Stop using Femara and get emergency medical help if you have any of these signs of an allergic reaction: difficulty swelling of your face, lips, tongue, or throat. Now am feeling really down and guilty because this is supposed femara fertility drug to be happy time. Patients had received other hormonal therapies and also may have received cytotoxic therapy. In adult nontumor- and tumor-bearing female animals, letrozole is as effective as ovariectomy in reducing uterine weight, elevating serum LH, and causing the regression of estrogen-dependent tumors. Further follow-up will be needed to determine long-term results, safety and efficacy.