Protease inhibitors work for some and not others because of the energetic as well as chemical effects of the drugs. By energetic effects I mean the effects medicinals have on the subtle energies of the body, the body as viewed as a series of energy vortices rather than merely a chemical machine. Temperature means the inherent effect the medicinal has on the body after ingestion. Black tea for example, whether drunk hot, cold or tepid, once ingested, has the energetic effect of cooling the body. Direction means whether the substance causes energy in the body to rise toward the head or sink toward the feet, and also float towards the body's surface or sink deeper toward the core.
Taste means whether sweet, sour, salty, bitter, pungent, bland or a combination.
Different tastes have different actions. In brief, sweet tonifies, sour astringes, salty softens hardness, bitter clears heat, pungent disperses and bland acts as diuretic. Substances are classified according to their most prominent effect on the body, which differs somewhat according to the classifier. Actions mean such things as dispersing the surface, clearing heat, draining dampness and so on. Indications mean specific patterns of illness treated with the medicinal.