Decadrone is a steroid and it is never to be used for gaining weight.yes anabolic steroid
is used but we advice in seriously ill patients,you should not go for it.
Practine is an anti histamine
but now a days it is mainly used for gaining wt.It increases appetite and help in gaining wt.
To join the gym and wt lifting at this stage I do not advice as, if more calories used by this exercise than calorie intake you may loss the wt ! so what is my practical experience is to gain the wt,create positive calorie balance and then think of gym.
take high protein,nourishing diet.
ok and bye.