Another problem associated with occupational exposure to tetracycline is drug resistance. Workers may develop infections that are resistant to treatment with tetracycline. Nitrates act on the blood vessels of the body and their effects are felt in several ways. Almost everyone exposed to nitro dust experiences a severe pounding headache which is caused by the relaxation of the blood vessels within the skull. Headaches may be accompanied by a rapid heart beat and a flushed face.
Nitrates dilate the blood vessels and make blood pressure fall.
As a result, dizziness and even fainting may occur. Both chlordiazepoxide and meprobamate are prescribed as sedatives. Both are habituating and additive. In combination with alcohol, they may cause a person to lose consciousness and in high doses, can lead to coma and death. Workers producing tranquilizers are at risk of these adverse effects and have found that they pass out over a beer after work.