In recent years multiplied their entry into the pharmaceutical market various products for hair loss. Drugs have been discovered that its active ingredients act in its concentration in blood and are orally conveys as drops or tablets, but others have active ingredients that act directly on the scalp, because only act locally and used as topical lotions.

Classification of for hair loss products by the mode of action:

• ORALLY: Finasteride 1mg. It is a drug whose active ingredients stimulate the hair follicle growth, through its inhibitory action on an enzyme called alpha-5-reductase, which transforms testosterone into dihydrotestosterone, which weakens the hair. Being a male sex hormone, the product for hair loss is for men suffering from androgenetic alopecia, but not in pregnant women at risk of pregnancy, or those who are breastfeeding. Side Effects: Some men can cause sexual dysfunction such as decreased libido and difficulty with erection. It is given one tablet of 1 milligram daily. The evaluation of the effectiveness of this product should be done after three months.
• BY CONTACT: Minoxidil 2% to 5% in a lotion applied locally to the scalp. Its active ingredients stimulate the hair follicle growth, but also favor blood flow by vasodilatation, causing it to supply more oxygen to the cells of the follicle. Used in both men and women suffering from various types of alopecia, their dosage can be prescribed 2 or 3 times a day accompanied by soft massage on the scalp. First wash the hair properly with shampoo neutral, allowing it to dry without the help of hair dryer and then verify that no moisture, putting the drops in the form above. Contraindicated, as in the previous case, and should not be applied or for pregnant or lactating women. In the case of men, is contraindicated in certain cardiovascular conditions such as ischemic heart disease and hypertension. Warnings: acid for their effect, avoid contact with eyes and mouth and nasal mucosa.