Can Royal Gold Capsules Increase Penis Size And Sex Stamina?

Sir,i m using Royal gold capsules as directed by my doctor,to increase my sex stamina and most importantly for increasing my penis size,which he says will increase by 2inch in 2 months.so please tell me,whether the info provided by him is true to my knowledge or there s some hidden info in it.plz help.i m 22years old,penis size is 5inch.