Questions regarding the effectiveness of hair loss treatments

I'm worried because my hair is getting thinner and the top of my head seems to be getting sparse.

I feel that home care has its limits, so I am looking into professional treatment. However, I am posting this question because I am unsure about the effectiveness of hair loss procedures. I have heard that there are various methods available on the market, such as follicular injections, and I am curious to know if anyone has actually seen results from these treatments.

Typically, after starting treatment, how many months does it take to feel the effects of the hair loss procedure, such as hair becoming thicker or new hair growing? I know there is a lot of individual variation, but I am also concerned about the general duration of results and potential side effects.

I’ve heard that the effects of the hair loss treatment are maximized when combined with medication, but I’m also wondering if sufficient improvement is possible with the treatment alone. I am very concerned about whether the results of the treatment will be satisfactory relative to the cost, so sharing actual reviews or medical opinions would be a great help in making my decision.