Hypnal.
Hypophosphites: very useful in early stage.
Ichthalbin: internally, to regulate digestive functions, increase food-assimilation and act as reconstitutive.
Ichthyol: by inhalation.
Inulin: possibly useful.
Iodine: liniment as a counter-irritant to remove the consolidation in early stage, and to remove pain and cough later; as inhalation to lessen cough and expectoration.
Iodine Tincture.
Iodipin.
Iodoform: inhalation.
Iodole.