Lethal injection is a method of execution involving the administration of a series of drugs to induce a humane and relatively painless death. The components of a typical lethal injection protocol include three drugs administered sequentially: an anesthetic, a paralytic agent, and a drug that induces cardiac arrest. Firstly, an anesthetic like sodium thiopental or pentobarbital is administered to induce unconsciousness. This ensures that the condemned individual is unaware of subsequent events and theoretically minimizes suffering. The anesthetic is given at a dosage intended to cause deep sedation and respiratory arrest. Following the administration of the anesthetic, a paralytic agent such as pancuronium bromide is injected. This drug induces paralysis, inhibiting all voluntary muscle movements, including respiration. It serves to prevent convulsions and other involuntary bodily movements that might be distressing to witnesses. The final component is a drug like potassium chloride, which is used to stop the heart by inducing cardiac arrest. This component causes hyperkalemia, disrupting the electrical impulses in the heart and leading to its cessation. It's important to note that debates surround the ethics and humaneness of lethal injection, as concerns have been raised about potential pain and suffering caused by improper administration or drug selection. As such, lethal injection protocols have evolved and been subject to legal scrutiny in various jurisdictions.