Does testosterone affect sleep apnea?

Testosterone, particularly at supraphysiological doses from TRT, can worsen or precipitate obstructive sleep apnea, likely through effects on upper airway dilator muscle function, changes in respiratory drive, and reduced chemoreceptor sensitivity, and men with undiagnosed sleep apnea who start TRT may experience significant worsening of their sleep architecture and symptoms (Cistulli et al., Thorax, 1994).

The TRT-sleep apnea interaction creates a double clinical risk: TRT worsens sleep apnea → worsened sleep apnea suppresses testosterone production → more TRT needed → more sleep apnea worsening. In men with pre-existing sleep apnea on CPAP, TRT typically does not significantly worsen the condition if CPAP is being used. The risk is primarily in undiagnosed sleep apnea.

Honesty Scale: Solid (1) for TRT's potential to worsen OSA. Solid (1) for the importance of OSA screening before TRT.

What to do: Before starting TRT, answer the STOP-BANG questionnaire (snoring, tiredness, observed apneas, blood pressure, BMI, age, neck circumference, gender), a score above 3 suggests moderate-to-high OSA risk and warrants a sleep study before TRT initiation.

For the full picture, read The Testosterone/TRT Deep Dive