Herpes Zoster Varicella-zoster virus: A herpesvirus that causes chickenpox and shingles. Causes an acute viral infection--inflammation of the sensory ganglia of spinal or cranial nerves and the eruption of vesicles along the affected nerve path. It usually strikes only one side of the body and is often accompanied by severe neuralgia. Honduras Bark Dried bark of a tropical American tree (Picramnia antidesma) formerly used in the treatment of syphilis and skin diseases. Hunyadi (Hunyady ) Hungarian noble family, partly of Romanian origin. The first recorded member of the family was Serbe, who settled in Hunyad county in Transylvania from Wallachia. hydrastis Genus of herbs (family Ranunculaceae) with palmately lobed leaves and small greenish flowers and including the goldenseal (H. canadensis). The dried rhizome and roots of the goldenseal formerly used in pharmacy as a bitter tonic and antiseptic called also goldenseal. hydragogue Cathartics that aid in the removal of edematous fluids and promote the discharge of fluid from the bowels. hydrophobia (rabies) Viral disease of the nervous system of warm-blooded animals. Transmitted by a rhabdovirus (genus Lyssavirus) in infected saliva of a rabid animal. Causes increased salivation, abnormal behavior, and paralysis and death when untreated hypophosphite Salt of hypophosphorous acid. hyoscine (scopolamine) An alkaloid, C17H21NO4, from plants such as henbane; used as a mydriatic (dilatate the pupils) and sedative, and to treat nausea and motion sickness. hyoscyamus Poisonous Eurasian herbs of the family Solanaceae that have simple leaves, irregular flowers, and include the henbane (H. niger). Dried leaves of the henbane containing the alkaloids hyoscyamine and scopolamine, used as an antispasmodic and sedative. ichthyol Oily substance prepared by the dry distillation of a bituminous mineral containing fossil fishes. Used as a remedy for some skin diseases. ignatia Dried ripe seeds of the Saint-Ignatius's-bean used like nux vomica. impetigo Contagious bacterial skin infection, usually of children, indicated by the eruption of superficial pustules with thick yellow crusts, commonly on the face. incommode Cause inconvenience; disturb. inspissate Undergo thickening or cause to thicken, as by boiling or evaporation; condense. intercostal Relating to or near a rib. iodoform Yellowish crystalline compound, CHI3, used as an antiseptic. ipecac Tropical American shrub (Cephaelis ipecacuanha) that yields emetine. Medicinal preparation made from this shrub used to induce vomiting. Iris Florentina (Florentine iris, orris, Iris germanica florentina, Iris florentina) German iris having large white flowers and a fragrant rhizome. Irish moss (carrageen) Edible North Atlantic seaweed (Chondrus crispus) that yields a mucilaginous substance used medicinally and in preparing jellies.