I need some medicines for good hair growth, I am...

What is the treatment of hair falling  :
1. consult a dermatology doctor to do the needed medical examnation and determine the treatment pathway
2. have a healthy diet and avoid stress 
3. if there is infection or disease in sculp or hair area , treat it first before starting hair loss treatment 
4. doctor may prescribe medication such as :
- minoxidil 
- Finasteride
5. if medications didnt work out effectivily , you can do hair implantation 
How long does the medication ( minoxidil and Finasteride ) take time before showing any effects :
usually minoxidil and Finasteride take around 6-12 months before showing results , but sometimes results show up as early as 3 months 
Vitamins that are helpful to hair loss :
1. vitamin C 
2. vitamin E 
4. vitamin A 
4. zinc 
5. selenium 
6. biotin 
7. vitamin b 12 
What to do regarding gray hair  :
1. visit  dermatology doctor to do the needed medical examnations and determine the treatment pathways 
2. taking good care of your hair health to avoid worsning the medical condition 
3. avoid smoking , using any chemical substance which will make your medical condition worse as well
4. using sunblocking and herbal products to protect your bread hair and usually its contain cinnamidopropyltrimonium
chloride
5. oral suppliment such as Methionine
6. you can also some dying hair product but try to use herbal and natural products as much as you can