Suggest Treatment For Pain In Shoulders And Arm Muscles

I went to the gym recently ...and after 1 week of cardio I was recommended for weight training and after the weight training for first day I am experiencing pain in my my shoulder and arms muscle and in the hand and too an extent in the chest ..I cannot even lift my hand properly when I try doing so it pains ...(I havent gone to gym before) So is there any medicine or spray that I can use to reduce the pain ..and from when exactly can I resume gyming ..(a friend of mine has recommended mobijox for the muscle pain ..but I am not sure whether to take it ..kindly suggest

my age is 26 height is 5.5 and I had no previous joint pains or something and een not under any medication