Suggest Treatment For Hair Fall

Dear Doctor,i am a 19 year old boy.My weight is 58 kg and my height Is 5.10feet.I am suffering from the problem of hair loss since I was 15.Hair Is being loss in round patches from my head and my eye brows have totally gone.Now my moustach is also getting lost.I reffered to some websites and found it as alopecia and I heared that some injection can give fast effect.Is it right Doctor?Help me...