Drinking alcohol while on Lexapro may cause the following effects:
decreased efficacy of the medication
increased anxiety
worsening depression
sedation
There is also a danger that alcohol may increase the risk for Lexapro-related side effects. These can also be felt at a greater degree with alcohol usage. Side effects of the medication include:
nausea
insomnia
sleepiness
dry mouth
diarrhea
www.healthline.com/health/depression/lexapro-and-alcohol#Effects4