Worms that cycle exhibit a number of symptoms, depending on species.
Localized burning areas
vomit (usually upper GI males to Pyrantel)
burning sinus drip
Toxins like dying
and many more.
Yes meds will make these symptoms appear, and you can journal the cycles if there are not to many infections.
parasites have chemistries that are totally different than human ones, and some tricks they use are just like human ones.
Don't be afraid to press on them a bit, and see what symptoms present. It helps identify and allows you to tune your formula.