What does qid bid tid OS sq in drug dose mean? qid four times daily bid twice daily tid three times daily OS in left eye (oculo sinister) sq subcutaneously Oh and another one is QOD = Every Other Day :)
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An is one that is under study and is not approved by the U.S. (FDA) for sale in the United States. Medical research studies are conducted to evaluate the safety and effectiveness of an investigational drug. These research studies are also called clinical trials.