Neither one of those are meds, they are more of a water treatment/additive. Cycle advertises itself as a bacterial suppliment, the only reliable one I have heard of is Bio Spira, which must be kept refrigerated since it contains live bacteria.
Waste control is another additive which does more for making the aquarist feel better than anything else. The best waste control for plecs is water changes with frequent gravel vacs.
Is there any particular reason you plan on using these additives?