year ago I suffered very much from hair loss too and I started trying everything you can imagine to stop my hair loss.
the things that really worked for me was:

1) Vitamin A – an anti-oxidant which promotes healthy production of sebum in the scalp;

2) Vitamin E stimulates circulation. Good blood circulation in the scalp is important in keeping hair follicles productive. The ‘B’ vitamins contribute to melanin, which gives hair its healthy color and also stimulates blood circulation;

3) massage is also beneficial. Massage stimulates circulation. As already noted, good circulation in the scalp keeps hair follicles active. Experts suggest a few minutes of daily head massage by hand. Circulation through massage may be improved by using a few drops of lavender or bay essential oil in an almond or sesame oil base with massage;

4) Try rubbing your scalp with garlic juice, Onion Juice or Ginger Juice(you can either of one out of three, Do not mix any of two or three);

5) also I used herbal treatment – TrichoZed
It is a good product that helps prevent hair loss and it is an FDA approved product. I think it is very important!

It worked and still works for me!

I do not know if any pharmacies carry TrichoZed but I do know that you should purchase it directly from the manufacturer and read more about the product here http://www.trichozed.info/why.php

It enhances hair growth by blocking DHT (Dihydrotestostrone) – a major cause of hair loss!

good luck!

not only my and my husband`s own personal experience

http://www.trichozed.info

You can try this. Mix 1 egg, 2 tablespoon of milk powder and 1 tablespoon of wheat germ oil. Massage on scalp and leave for 30 minutes. Wash with a mild shampoo at least once a week to arrest hair fall. Check out http://usefulinfo-hairloss.blogspot.com/ for more info.

you can find your answer here in
http://teensandhealth.blogspot.com/2009/02/prevention-of-hair-loss.html