Is it safe to take more than 20 mg of lexapro (escitalopram)? i've heard and read this is the highest dose but my doctor says you can take up to 40mg.

The mfg says 20: Trusting your doctor can be beneficial - but that's most true when they are right. In this case it is clearly risky. You could be fine, but if you're not - who'll pay the price? Many say it makes them feel way too groggy and dull - even dangerously so. It would make w/drawal harder too. Especially if it's a GP, I'd try for a 2nd live opinion w/ a specialist.