Inhalation of phenol vapor may cause lung edema. Exposure occurs through inhalation, ingestion or occasionally skin contact. Heart rate increases during inhalation and decreases during exhalation. Poisoning can occur from ingestion, inhalation, or skin absorption. Other methods are nasal inhalation and nasal instillation. Acute toxicity looks at lethal effects following oral, dermal or inhalation exposure. Sodium fluoride is classed as toxic by both inhalation (of dusts or aerosols) and ingestion. The FDA granted approval of the generic albuterol sulfate inhalation aerosol to Perrigo Pharmaceutical Co. Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust. For lung damage caused by inhalation, oxygen and bronchodilators may be administered. Internal contamination protection equipment protects against the inhalation and ingestion of radioactive material. During heavy breathing, exhalation is caused by relaxation of all the muscles of inhalation. Direct inhalation or ingestion of molybdenum and its oxides should be avoided. It is harmful by inhalation and ingestion. The bacteria enter the body through wounds, inhalation, or ingestion.