It all depends on how long you have been taking them for. If you were taking them for a very short time then your body/brain will not notice a change. If you have been on them for a longer period then it will be different. The half life of a medication will mean that the effects of the medication will stay in your body for a week to ten days after you have actually stopped it.

If you have been taking anti'ps for a while then chances are your symptoms will return. Take care and maybe check in with your P'doc before you begin to feel unwell again.