I have rapid blinking. So bad sometimes it is difficult to see between blinks. Sometimes not there at all. Is this a side effect or drug interaction? I'm on citalopram hydrobromide, trazodone, gabapentin, hydrochlorothiazide, conjugated estrogen Premarin, ezetimibe, levothyroxine, glucosamine. Frequently take antiinflammatory and or muscle relaxers.