You need to take into account dosage. They usually have to go through it again, FDA clinical trials (phase i, ii, iii) with different dosage to see what's effe

You need to take into account dosage. They usually have to go through it again, FDA clinical trials (phase i, ii, iii) with different dosage to see what's effective. Increase in dosage can increase chances of side effect or create new ones. There may be laws to get around or fast track that but pharma company have a dedicated department to figure that out. Just like that one company that causes opioid epidemic.