Removing parasites is like peeling an onion, Flats must be gone to remove whites. Whites must be gone to remove reds.
Levamisole dosing range typical is 0.88 to 1.32mg/kg/D total dose in smaller doses. Milligram like caps are used.
The clearing process of reds, involves using several NAChRs
Pyrantel and Levamisole are two of the strongest meds.
This is usually one of the last steps in a long process, best to keep dosing low, if a med works, it works within a construct of supplements, body balance, and manipulation to counter parasite influence.
These formulas when done in a sequence clear the body by peeling the onion.
If red worms are causing your joint pain, you need to clear any flat worms, or white worms first, to get to the red worm infection.