What is the purpose of a toxicity test?

The purpose of a toxicity test is to determine harmful effects at certain concentrations. This is vital in pharmacology because it ensures that drugs are safe for use and helps establish a therapeutic range—where a drug is effective without causing adverse effects. By identifying the concentration at which a drug may become toxic, healthcare professionals can better prescribe dosages that provide therapeutic benefits while minimizing the risk of toxicity. This testing is particularly crucial during the drug development process and before a medication is approved for clinical use, as it safeguards patients from potential overdoses and prevents adverse reactions.