Dont know about Zoloft but Prozac common side effects can be ( I've bolded the ones I've experienced and underlined the ones I still get after 2 months)
sleep problems (insomnia), strange dreams;
headache, dizziness, vision changes;
tremors or shaking, feeling anxious or nervous;
pain, weakness, yawning, tired feeling;
upset stomach, loss of appetite, nausea, vomiting, diarrhea;
dry mouth, sweating, hot flashes;
changes in weight or appetite;
stuffy nose, sinus pain, sore throat, flu symptoms; or
decreased sex drive, impotence, or difficulty having an orgasm.
Prozac can give you suicidal thoughts but that's generally in younger people.
Here's a complete list of side effects.
Edit: I find there is a big difference in effectiveness between branded and generic Prozac
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