Cyproterone acetate is a medication used in gender-affirming hormone therapy to reduce the effects of testosterone for trans women and non-some binary people. It can help decrease facial and body hair growth, lower libido, and reduce spontaneous erections. #
Cyproterone acetate is usually available in tablet form and usually costs £10-£40 a month. Common strengths include 10 mg, 50 mg, or 100 mg tablets, depending on the prescribing guidelines in your region.
Possible Side Effects
Most people tolerate cyproterone acetate well, but side effects can include:
Common
Tiredness or low energy
Lower libido
Mood changes
Weight changes
Less common
Changes in liver function
Changes in mood or mental health
Breast tenderness
Reduced fertility (possibly long-term)
Monitoring
Cyproterone acetate can affect liver function, and so isn't appropriate for anyone with liver impairment. Liver function blood tests are needed both before starting on cyproterone acetate, and every three months while you're taking it. You can read about essential blood tests here.