Does 2.5mg dose of lexapro cause side effects the same as the higher doses? or lower doses cause fewer side effects?

It varies a lot. Most side effects are less with a smaller dose but some may be the same. In general, side effects are dose dependent except allergic reaction. Take care.

Lower doses of Lexapro typically cause less side effects compared to higher doses. At a higher dose, Lexapro is more likely to cause stomach upset, for example. However, medications affect people differently; some people may experience the same side effects at lower doses as they would at higher doses.