 
 <prompt> How dem dey test drugs? Given di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: For US, new drug gats get approval from FDA say e dey safe and e dey work well. Dem go submit Investigational New Drug filing with pre-clinical data for human trials. After IND approval, dem fit do three phases of clinical trials wey dey get more people. Phase I dey check if e dey toxic for healthy people. Phase II fit include how e dey work for patients, and Phase III dey check if e dey work well for the people wey dem wan give am. If e pass Phase III, dem go submit New Drug Application to FDA. Dem go review the data and if dem see say e dey good, dem go approve am to sell for US. 