I took finasteride (Propecia) and lost my chest hair, is this common?

Loss of body hair occurs in patients on Propecia (finasteride) but not always. I suspect that the DHT block from the drug finaseride is not very effective on body hair in everyone and that is why different people see varying degrees of body hair loss.  It is not unusual to get a decrease in body hair and if you take it long enough, maybe you will see complete loss of your body body hair.