The most common chemicals used to start the meth-making process are over-the-counter cold and asthma medications that contain ephedrine or pseudo-ephedrine as decongestants or stimulants.
Even exposure to small amounts of the hazardous chemicals can cause adverse health effects.
Meth Lab Residue
Toxic droplets and particulates from the methamphetamine production process deposits chemicals and methamphetamine residues on interior surfaces including: walls, ceilings, floors, doors, cabinets, and furniture. Porous items such as carpet and upholstery readily absorb the meth residue and remain in the fabric unless removed by decontamination. Exposure to meth residue may cause adverse health effects and/or behavioral changes. Meth residue-contaminated properties need to be properly evaluated and decontaminated before being categorized as habitable by a public health official.
The methamphetamine final decontamination standard in Indiana according to 318 IAC 1 is 0.5ug/100cm2