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21,041 Testing Laboratories Companies in the United States. Search or browse our list of Testing Laboratories companies by category or location. Skip navigation
Once a company develops a drug, it undergoes around three and a half years of laboratory testing, before an application is made to the U.S. Food and Drug Administration (FDA) to begin testing the drug in humans. Only one in 1000 of the compounds that enter laboratory testing will ever make it to human testing.