Lexapro vs Buspar?

has anyone had experiences with both medications? whether you took them together or separately? I'm tempted to switch from Lexapro to Buspar because of all the side effects Lexapro is causing me to have, but I like how the Lexapro calms my anxiety and helps my hot flashes. side effects I'm experiencing on Lexapro: Excessive gas insomnia (doesn't matter what time of day I take the pill) Weight gain Frequent Sugar cravings Extreme tiredness/sleeping as much as 12 hours a day Constipation (I've been diagnosed with IBS-C and Lazy Bowel Syndrome).