Where did my sex drive go?
Not a diagnosis: a head start. These are the three drivers most worth checking first, based on what the evidence says gets missed most often.
Testosterone, both sexes
Low T flattens drive in men and women. Total + free testosterone, morning sample.
Medication audit
SSRIs, some blood pressure drugs and hormonal contraception are common silent causes.
Energy budget
Exhaustion, stress and bad sleep mean libido is last in the queue. Fix upstream first.
Morning testosterone (total + SHBG), TSH, ferritin, prolactin
1. Start a two-minute note so the pattern becomes visible.
2. Take the test list above with you so you can explain the pattern clearly.
3. Read the evidence: Low Libido: Causes, Tests and What Helps in the UK.
Education, not diagnosis, and never a replacement for your GP or pharmacist. Reference ranges and guidance vary; sudden, severe or worsening symptoms need 111, or 999 in an emergency. By Hussain Sharifi · independent, affiliate-free health research.