<prompt> Mechanism of action of SSRI:Inhibit the reuptake of norepinephrineInhibit the reuptake of norepinephrine and serotoninInhibit the reuptake of dopamineInhibit the reuptake of serotonin  <response>: Ans. D. Inhibit the reuptake of serotoninAs the name suggest SSRI selectively inhibit the reuptake of serotonin. They lack anticholinergic and alpha blocking properties. They are the first choice of OCD, depression, phobia, panic and PTSD. Unlike TCA, they dont cause sedation or weight gain. 