The high blood pressure drug you are probably referring to is minoxidil, which is applied to the skin on your head. I would suggest you contact your physician to see if you would be a good candidate for the drug.
A balanced diet from the Food Guide Pyramid, (meat, milk, bread, fruits, vegetables, and fat) which includes a variety of foods should provide you with a diet that fulfills your Recommended Dietary Allowances (RDA). Hair is made of protein and a diet deficient in protein would show up in more hair loss. A very low-calorie diet (less than 600 calories per day) would also cause hair loss because of a lack of dietary protein.
Vitamin therapy would also not be recommended for hair growth. Vitamin and or mineral supplements would not be effective in stimulating hair growth. Currently other than minoxidil, there is not any product on the market that will stimulate hair growth.
Washing does not remove vitamins or minerals from your hair. Hair is composed mainly of keratin protein. Applying incomplete proteins such as collagen to the hair will not change hair structure.
Hair is composed of dead cells, as are your fingernails. That is why it does not hurt when you have either cut.
The quality, quantity, and distribution of hair are genetically determined. Take a look at your parent’s hair.
Hair analysis has not yet been determined appropriate for general nutritional evaluation, even though businesses in hair analysis operate. Researchers sent samples of hair from one individual to several hair analysis labs. The lab reports on the hair samples were inconsistent as to vitamin and mineral content. You would be wasting your money on hair analysis.