Rexipra is the brand name; the name of the medicine is escitalopram. It is a pretty potent drug with a large number of side effects and addiction potential. Hence, it is not the first line drug but should only be prescribed when other conventional anti-depressant medicines are found to be ineffective. It is good that you have reduced the dose to 5 mg, that too you take it once in a while. You can further taper the dose to 2.5 mg and then gradually give up. The symptoms being felt by you are due to withdrawal of the drug. There is no need to worry; these will go away.