In another example, it is known that autoimmunity is the cause of some forms of diabetes mellitus type 1, even though the particular molecular pathways by which it works are not yet understood. It is also common to know certain factors are associated with certain diseases; however, association and causality are two very different phenomena, as a third cause might be producing the disease, as well as an associated phenomenon. Incurable disease
A disease that cannot be cured. Incurable diseases are not necessarily terminal diseases, and sometimes a diseases symptoms can be treated sufficiently for the disease to have little or no impact on quality of life. Primary disease
A primary disease is a disease that is due to a root cause of illness, as opposed to secondary disease, which is a sequela, or complication that is caused by the primary disease. For example, a common cold is a primary disease, where rhinitis is a possible secondary disease, or sequela. A doctor must determine what primary disease, a cold or bacterial infection, is causing a patients secondary rhinitis when deciding whether or not to prescribe antibiotics. Secondary disease
A secondary disease is a disease that is a sequela or complication of a prior, causal disease, which is referred to as the primary disease or simply the underlying cause (root cause). For example, a bacterial infection can be primary, wherein a healthy person is exposed to bacteria and becomes infected, or it can be secondary to a primary cause, that predisposes the body to infection.
It is used as an adjuvant, adulterant, and diluent to street drugs such as cocaine and heroin. It is one of the three common ingredients in site enhancement oil used by bodybuilders. Adulterant in cocaine
Lidocaine is often added to cocaine as a diluent. Cocaine and lidocaine both numb the gums when applied. This gives the user the impression of high-quality cocaine, when in actuality the user is receiving a diluted product. Compendial status
Japanese Pharmacopoeia 15
United States Pharmacopeia 31

Veterinary use
It is a component of the veterinary drug Tributame along with embutramide and chloroquine used to carry out euthanasia on horses and dogs. See also
Dimethocaine (has some DRI activity)
Lidocaine/prilocaine
Procaine
Mexiletine

References
External links
"Lidocaine". Drug Information Portal. U.S. National Library of Medicine. "Lidocaine Transdermal Patch". MedlinePlus. US patent 2441498, Nils Magnus Loefgren & Bengt Josef Lundqvist, "Alkyl glycinanilides", published 1948-05-11, issued 1948-05-11,  assigned to ASTRA APOTEKARNES KEM FAB