I have not lost hair. my father and brother have.i want to prevent it and begin early with medication. what should i take?

Nothing: Unless you begin to get thin or lose lots of hair, save your money.

None Probably Best..: Currently, 2 agents with evidence of significant reduction/stopping hair loss: minoxidil; long used as potent oral anti-hypertensive; complications: marked water retention & hair growth. Used daily on the skin (not ingested) in areas of hair loss, has a track record of reducing hair loss, without edema or BP effect.. In men, Finasteride may help. These & hair transplant only effective options.

Agree , Dr. Alvis..: Correct but, realize it is genetic, likely to occur -- best is to change attitude to hair loss my best uncle growing up was bald, so i never had a 'wory/ concern' about it revel in your family's characteristic[s].

Testosterone: In men with high levels of total and free testosterone this pattern of hair loss is common. Have your family md measure total and free testosterone and Estradiol in your blood, and then we can look at a biochemical reason for hair loss which may be treatable. Cj glueck md.