4 using diesel exhaust fluid Diesel exhaust fluiD (Def) Diesel Exhaust Fluid (DEF) is a non-flammable fluid comprised of 33% ammonia-based urea and 67% purified water. DEF is used with diesel engine exhaust systems to reduce the amount of emissions produced by turning Nitrogen Oxide (NOx) into nitrogen and water vapor.
Side Effects of Metaproterenol. Some of the most common side effects of metaproterenol include nervousness, headaches, and a dry mouth. While these are mostly minor, there are some potentially serious problems to be aware of.
Hormone replacement therapy side effects often impact the breast. Tenderness, swelling, and enlargement may develop. For some, this also points to increased breast density and therefore, a greater breast cancer risk. 2