I am a 23 year old female. I have been suffering from hair loss. consulted 2 doctors. don't know which medication to use

You need an exam and some laboratory work up (blood test).  Then the doctor will give you a diagnosis and a treatment plan.  It seems one doctor gave you an inexpensive option.  The other gave you an expensive option.The smarter doctor is not always the rich doctor.

Hello,There are multiple solutions to hair loss for women that are nonsurgical including:
Rogaine- There is a specific formulation for women
Supplements- This includes but not limited to Viviscal and Nutrafol which contain marine extract and anti-inflammatory substances to promote hair growth
PRP- Platelet rich plasma can promote hair growth and is a nonsurgical procedure in the office
Low level laser- Can promote hair growth in some patients
Regenerative medicine- There are additional growth factors which can be injected to promote hair growth
Seek advice from an expert or team of experts.  Best, Dr. Anil Shah

Without seeing your scalp and knowing more about your history, I can't provide advice on diagnosis or treatment. But a few generalizations may be helpful1. In general, all treatments for female hair thinning (androgenetic alopecia) are lifelong. Every treatment we know of will cause hair loss again if stopped. 2. I hear many patients tell me that they don't want to use minoxidil because they have heard that if they stop they will lose hair again. Those same rules apply for every single hair loss treatment for genetic hair loss. 3. Minoxidil remains the only FDA approved treatment for female pattern hair loss. Other options for genetic thinning in women include spironolactone, low level laser, and platelet rich plasma. These all have scientific evidence for their benefit with more than 10 scientific studies each.4. While minoxidil does not help everyone, it helps a small proportion.  Most treatments have little, if any, scientific evidence for helping hair loss in women with androgenetic alopecia.

Female hair loss in a 23 year old is unusual. It could be genetic and if it is, it is often present in the female family line (mother, sister, grandmother from either side of the family). Rapid weight loss can cause hair loss as well. There are many diseases that cause hair loss which should be evaluated as well including thyroid disease. These diseases can be evaluated by your family doctor by performing some simple blood tests including:  Sex Hormone testsSHBG (Sex Hormone Binding Globulin) used to test status of male hormonesEstradiol is a sex hormoneFSH (Follicle Stimulating Hormone) *not hair follicle but follicle in the ovary*LH (Luteinizing Hormone) is a sex hormoneFree TestosteroneTotal TestosteroneANA (Anti Nuclear Antibody) used to test for Lupus or other autoimmune diseasesTSH (Thyroid Stimulating Hormone) used to test for hyper or hypo-thyroid diseaseTest Iron statusTIBC (Total Iron Binding Capacity)FerritinIron