A small number of recreational inhalant drugs are pharmaceutical products that are used illicitly. Product category
Another way to categorize inhalants is by their product category. There are three main product categories: solvents; gases; and medical drugs which are used illicitly. Solvents
A wide range of volatile solvents intended for household or industrial use are inhaled as recreational drugs. This includes petroleum products (gasoline and kerosene), toluene (used in paint thinner, permanent markers, contact cement and model glue), and acetone (used in nail polish remover). These solvents vaporize at room temperature. Ethanol (the alcohol which is normally drunk) is sometimes inhaled, but this cannot be done at room temperature. The ethanol must be converted from liquid into gaseous state (vapor) or aerosol (mist), in some cases using a nebulizer, a machine that agitates the liquid into an aerosol. The sale of nebulizers for inhaling ethanol was banned in some US states due to safety concerns. Gases
A number of gases intended for household or industrial use are inhaled as recreational drugs. This includes chlorofluorocarbons used in aerosols and propellants (e.g., aerosol hair spray, aerosol deodorant). A gas used as a propellant in whipped cream aerosol containers, nitrous oxide, is used as a recreational drug. Pressurized canisters of propane and butane gas, both of which are intended for use as fuels, are used as inhalants.
Plasmacytosis is a condition in which there is an unusually large proportion of plasma cells in tissues, exudates, or blood. : 743   Plasmacytosis may be divided into two types—cutaneous and systemic—both of which have identical skin findings. : 743 
Patients with plasmacytosis have been predominantly found to have lung infections (pneumonia, tuberculosis, abscess) whereas multiple myeloma is rarely found. See also
Cutaneous B-cell lymphoma
Multiple myeloma
Plasmacytoma
Skin lesion

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