A: For localized hair loss the most common causes are traction (due to tight braiding) and alopecia areata (an autoimmune disease that produces smooth round patches of hair loss).

Other than genetic (hereditary) thinning; generalized hair loss is most commonly caused by medications, anemia, and thyroid disease.

A: Finasteride is the best medication. Herbs are not particularly effective for hair loss. You should consider trying finasteride.

If you are in the 2% group that has side effects with Propecia, just stop taking the medication. If you do not experience side effects, then there is no problem taking the medication long-term. Hair transplant surgery doesn’t prevent the progression of hair loss. That is why it is used in conjunction with medication.

Laser therapy can cause shedding initially (as can Propecia and Rogaine), but this means it is working. It does not cause actual hair loss. Your skepticism of the value of Laser therapy long term is one we have as well. Keep in mind, however, that while long-term studies are extremely important, they are very hard and costly to run and there is little incentive for companies to do this.

It is interesting that the FDA does not require longer term data on medications or devices that need to be used on a continued basis.

A: Finasteride, the active drug in Propecia, can change the quality of the semen, since it is decreasing the component of seminal fluid that is secreted by the prostate.

You may want to consider having your sperm counts checked, although a decreased sperm count is rare with finasteride. If the symptoms are not bothering you and the sperm counts are normal, it should be OK to continue the medication.

A: It is not necessary to take any medication for a hair transplant other than the local anesthesia used during the procedure.

Although I would not have a hair transplant during pregnancy, the procedure will have no effect on future ones.

A: I am currently not recommending that patients take Dutasteride for hair loss, although it is more effective than Propecia, finasteride 1mg. (Dutasteride 0.5, the dose generally used for hair loss, seems to be slightly more effective than finasteride 5m in reversing miniaturization.)

The reasons that I am hesitant to prescribe it at present are outlined in the Hair Transplant Blog question Is Avodart Safe?

In addition to the reasons that I listed in that response, I would also consider that: Dutasteride, unlike finasteride, decreases sperm counts, it can result in persistent decreased sex drive and the incidence is greater than with finasteride. Finally there are a significant number of alpha-type 1 receptors in brain, those affected by dutasteride, but not finasteride.

However, since Dutasteride is approved for older men with prostatic disease, using it for hair loss in this age group (usually in a lower dose) is reasonable.