Sodium Hydrogen Sulfide (hydrate) is, like nitric oxide, an important gaseous mediator that has significant effects on the immunological, neurological, cardiovascular and pulmonary systems of mammals.

Pyridaben is a METI acaricide that inhibits mitochondrial electron transport at complex I (METI; Ki = 0.36 nmol/mg protein in rat brain mitochondria).

Pyrantel tartrate is an antinematodal thiophene; and can elicit spastic muscle paralysis in parasitic worms due to prolonged activation of the excitatory nicotinic acetylcholine (nACh) receptors on body wall muscle.