Could you please share an incident/example, or two?
this girl was asked to read something 500 times after every isha prayer... and she continued this for about 3 months... only to find out from another Maulana said that such a wazeefa wasn't helping her at all, rather increasing her chiRhchiRhapan... she started getting irritated at everything and would snap at anyone, anytime (which was uncharacteristic of her).
adverse effects usually occur when you go overboard with wazeefas and read them 24/7. None of the above mentioned prayers sound like they can drive anyone insane.
i never said that those listed above would have adverse effect, I just said to be careful with 'em :)
but I guess the main point was that if the Prophet SAW has already shown us how we should deal with such situations, then why turn to wazeefas?