Common side effects include nausea, nervousness, dry mouth, light-headedness and urinary retention. Less common side effects include vomiting, blurred vision, drowsiness, sweating, insomnia, headache, confusion, hallucinations, tachycardia, aggravation of angina and rarely a temporary and benign pink discolouration of the skin or erythema multiforme.
Nefopam
Setiptiline
Lofexidine
Ivabradine
Fenoldopam
Verapamil
Alvimopan
Iofetamine 