The document discusses different types of drug induced toxicity. It notes that while drugs are intended to treat diseases, they can also have toxic effects on certain patients due to unwanted pharmacological effects. It describes how drugs can induce harmful immune responses like hypersensitivity reactions and autoimmune diseases. Autoimmunity can occur when a drug causes the immune system to attack the body's own cells. The document also mentions that as more people take multiple medications, there are increased risks of drug-drug interactions, which can have pharmacological or dynamic effects. Drug toxicity can range in severity from minor side effects to life-threatening conditions.