TLDR Finasteride may worsen blood sugar control in diabetic patients.
This case study discusses a 69-year-old obese male diabetic patient who experienced worsening hyperglycemia after starting finasteride, a 5-alpha reductase inhibitor, in 2018. The patient's hemoglobin A1c increased from 7% to 8.2%, and he reported weight gain. The study suggests that finasteride may induce hyperglycemia by causing insulin resistance and liver disturbances. It recommends cautious monitoring or avoidance of finasteride or dutasteride in diabetic patients to prevent worsening hyperglycemia and related complications.
June 2023 in “Clinica Chimica Acta” Finasteride and dutasteride effectively reduce DHT in hair, which may help evaluate their treatment success for hair loss.
19 citations,
April 2020 in “Dermatologic Therapy” Dutasteride works better than finasteride for hair loss, with both being safe to use.
August 2016 in “Journal of Investigative Dermatology” 
January 2015 in “프로그램북(구 초록집)” Dutasteride is effective and safe for treating common hair loss, and it's more potent than finasteride, leading to better hair growth and thickness.
215 citations,
November 2006 in “Journal of The American Academy of Dermatology” Dutasteride more effective for hair growth, but has more side effects than finasteride.
33 citations,
September 2005 in “PubMed” Dutasteride successfully treated a woman's hair loss when other treatments failed.
