My BP always runs low, but for the past 3-4 weeks, I've barely been able to move around-dizzy, fatigued, fuzzy-headed. Have been taking Lexapro successfully for 5 months, but am wondering if this is a side effect. Was at the ER for bumping my head and they said my BP was "off" when testing me while standing/sitting/laying down. I called the pharmacist to see if Lexapro could cause low BP and she said it wasn't a side effect. Is there different or other information available?