| Last fall, the company began testing its antivenom in a hospital in Mexico City. |
| As the search for effective antivenom goes on, the rattlers continue in their propensity for remaining placid until disturbed. |
| Even so, the antivenom may not be approved in the United States for several years: the demand is too low, and the cost of clinical trials too high. |
| For this reason, people who are allergic to horses are more likely to suffer an allergic reaction to antivenom. |
| There are five types of antivenom for specifically identified bites, and a polyvalent antivenom for use if the snake hasn't been identified. |
| Anascorp, an equine-derived antivenom, is the first of a series of antivenoms in the Rare Disease Therapeutics, Inc. |
