FF, Escitalopram is not Prozac. Escitalopram is the generic name of the drug (the active ingredient), its brand name being Cipralex.
Crystaltips, Prozac is the brand name of an SSRI called Fluoxetine. When Prozac first came out the company who created it had a 10 year license to exclusively make it, no other company could make an drug containing Fluoxetine. Now that 10 years is over other companies can make the same drug, but not call it Prozac as that is the brand name and the orginal company still own that. Like Kellogs and any other generic corn flakes.
All drugs work this way. They get a 10 year exclusiveness so they can recoup the cost of the research put into creating the drug.
NHS doctors are required to always, unless medically indicated, to prescribe the generic type as it is cheaper then the brand name type. So you will see Fluoxetine on your prescription, but if you pharmacy stocks Prozac you will get that instead of the generic and vice versa. The same with Escitalopram and Cipralex.
JJ is absolutely right, if the drug isn't working for you ask to get it changed, there are many others.
Generally I find it takes 2 weeks for the intial side effects to wear off, quicker for me with Prozac, longer with say the one I'm on now (Lustral/Zoloft).
ADs, like most drugs that work on the brain, are such an inexact science as no-one really knows how the brain works anyway.
Don't stop taking them too soon though as they do take a while to get working. Try not to take them on an empty stomach. This always helped me feel less zombie like.
I'll stop ranting now
xxxx