There are prescription drugs, herbal remedies and topical applications for hair loss. Go a more natural way with treatment if possible; taking hair loss drugs require many months of exposure to chemicals. There are natural home remedies and many recipes for making mixtures to apply topically to the scalp.
Please be aware there are side effects and serious side effects sometimes with the drugs that are commonly used for hair loss. Immunosuppressants applied to the scalp have been shown to temporarily reverse alopecia areata, though the side effects of some of these drugs make this therapy questionable. Stress reduction can be helpful in slowing hair loss.