Dutasteride is an inhibitor of the enzyme 5 alpha-reductase that is responsible for the conversion of testosterone to DHT (dihydrotestosterone). However, Dutasteride inhibits both the Type I and Type II forms of the 5 alpha-reductase enzyme. This dual effect makes the drug more potent but also increases the incidence of adverse reactions.

Scientific researchers have discovered that men that are suffering from either male pattern hair loss or Benign Prostatic Hyperplasia (BPH) have an increased level of the hormone, Dihydrotestosterone (DHT). This DHT is produced from testosterone by an enzyme called 5-alpha-reductase. Biochemical analysis shows that there is a higher level of 5-alpha-reductase in the bloodstream of men with BPH and in the scalps of men with hair loss. Analysis also reveals that there is less of this enzyme in men with no BPH or no hair loss. Dutasteride, chemical works by inhibiting the 5-alpha-reductase, therefore blocking the formation of DHT that interrupts a key trigger element in the development of male pattern hair loss and in the development of BPH.

Impotence, decreased libido, ejaculation disorder or breast enlargement and tenderness are some common side effects with this medication.

Dutasteride comes in a gel caps form that has to be consumed orally. It is usually prescribed for consuming once a day with or without food. Take it at around the same time every day. Symptoms may improve after you have taken this medicine for 3 months, but it may take 6 months or longer for to see complete benefits. It may also control symptoms without completely curing the condition. Continue consuming the medicine even if you feel good. Do not stop its consumption without talking to your doctor.