The most common effects of overexposure to methyl bromide are effects on the nervous system, including headache, nausea, vomiting, dizziness, blurred vision, poor coordination, and twitching.
High exposures can be fatal.
Liquid methyl bromide can cause severe, delayed, blistering burns. It is used mainly as a fumigant to kill insects in crops being stored or transported, to fumigate soil before planting, and to fumigate buildings. You can be exposed to methyl bromide if your work involves fumigating crops or soil, handling or transporting fumigated crops, working where fumigated crops are stored, or fumigating buildings. Methyl bromide is also used in the chemical industry. In the past, it was used in some fire extinguishers and as a refrigerant.