switching antidepressant pristiq to prozac...

my daughter switched from pristiq 50mg. taken for three months abruptly to prozac. she spent three days pucking and diareah...is this the meds or did she have something else..

she also stated the reason she switch is she was getting these electrical shocks all over her body...what was that...and should she stay off the meds. she does have a depression, stress, anxiety and add problem.