celexa is one of many prozac type meds, but 20 is too high a starting dose for an anxiety sufferer, IMO, unless you have previously done well on other meds of the same type
I would start at 5, just before bed by cutting the tablet if needed, a pill cutter can be got for a few dollars from a pharmacy
if all goes well, gradually up it to 10 then later to 20 The effective range is 10 to 60
sied effects are many and varied, some get none, valium type meds help reduce them but docs seldom think of this
the early side effects generally stop when the med starts working which is usually between 2 and 6 weeks, the med needs to be taken daily
theres a small chance the med will never work at any dose
celexa helped me a lot with anxiety and panic attacks and anxiety, I took it for several years
lexapro is said to be an improved version of celexa but I doubt its worth the extra cost