Pari-CR is the brand name of a medicine called paroxetine, a potent anti-psychotic agent with many side effects, which include tremors and abnormal ejaculation (of semen) apart from other male sexual dysfunctions and impotence. These side effects will go away when the medicine is discontinued. There is no point in consulting a urologist since it is a drug-related problem. Gradual reduction of dose culminating in total discontinuation, if clinically possible, is the answer.