With no approved testosterone for women, patients must divide packaged versions designed for men often at many times the doses they're seeking.
Jennifer Lanoff, a women's health nurse practitioner in Washington, D.C., said Amazon AMZN.O Pharmacy rejected prescriptions from her practice for the first time this year.
"We've done (off-label testosterone prescriptions) forever. It's clinical guidelines recommended. Amazon has not given us a problem before," she said. "I don't know exactly what happened or why they rejected. They say it was a new policy."
Lanoff said she has had some success rewriting prescriptions under which patients discard leftover gel rather than splitting doses for later use.
Amazon Pharmacy said it does not dispense some testosterone prescriptions that require women to customize doses in order to ensure safe and compliant dispensing. It added that the policy is not specific to testosterone or based on a patient's sex or gender identity.
The company said it refers customers to compounding pharmacies that mix ingredients for specialized doses.
Compounded testosterone can cost about $100 for a three-month supply compared with $30 after discounts for a 10-month supply at a commercial pharmacy, Lanoff said.
Most insurance companies do not cover testosterone for women, the doctors, nurses and patients said.
Magen Price, a nurse practitioner and founder of Mystic Valley Sexual Wellness, said more than one-third of the 80 patients in her practice who currently use testosterone have encountered issues with their prescriptions, including at CVS CVS.N and Walgreens pharmacies.
The issues that began last year have worsened, Price told Reuters.
When Amy Swan, a 55-year-old graphic designer outside Boston, tried to fill her first testosterone gel prescription in March, she expected a simple pharmacy visit.
Instead, she spent weeks trying to get a pharmacy to honor a GoodRx discount coupon that would reduce the cost by 25%.
"Hours of my time were lost just being able to get this one prescription," Swan said.
CVS said its pharmacies regularly fill prescriptions for topical testosterone gel for women. Other retailers with large pharmacies including Walgreens, Costco COST.O and Walmart WMT.N did not respond to requests for comment. Kroger KR.N declined to comment.
Kevin Schipper, a pharmacist and director of product lifecycle management at consulting firm ProPharma, said pharmacies may decline prescriptions due to concerns over dosing accuracy and medication safety, as well as stability, storage and contamination if single-use packaging is opened and reused.
Because it is a controlled substance — similar to aspirin with codeine — each state also has record-keeping requirements for the government.