It is important to keep in mind that medicines can affect each person differently. Some may experience no or very minor side effects, while others may find the drug more difficult to tolerate.
Lexapro side effects may include nausea, insomnia, somnolence, increased sweating, and fatigue.
If your symptoms continue or intensify please contact your physician. Only your Doctor can determine if it is safe to continue using Lexapro.
I am wondering if you stopped the Nexium? You mentioned the acid reflux.
I hope you get passed all this nausea soon.
Reference: PDR Pocket Guide; 7TH Edition