Clinical meaning
End-of-life (EOL) pharmacology requires the NP to shift from a curative treatment paradigm to one focused exclusively on symptom relief and comfort. The core symptoms requiring pharmacological management in dying patients are pain, dyspnea, respiratory secretions (death rattle), nausea/vomiting, terminal restlessness/agitation, and seizures. Several pharmacological principles differ fundamentally from standard prescribing: (1) Route of administration: as patients lose the ability to swallow, the NP must transition medications to alternative routes -- subcutaneous (preferred for most EOL medications because it avoids the need for IV access), sublingual/buccal (morphine concentrated solution, lorazepam, atropine drops), rectal (acetaminophen, diazepam, morphine), and transdermal (fentanyl patches for stable opioid requirements); the oral route becomes unreliable and eventually impossible. (2) Goal of therapy shifts from titrating to a lab value or clinical parameter to titrating to COMFORT -- the endpoint is symptom relief, not a target vital sign or level. (3) The principle of double effect provides ethical and legal justification for EOL prescribing: administering opioids or sedatives with the PRIMARY intent of relieving suffering is ethically appropriate even if a SECONDARY effect may be hastening death; the intent distinguishes comfort care from euthanasia. (4) Pharmacokinetics change in dying patients: declining hepatic function reduces first-pass metabolism and drug clearance (increasing drug half-lives); declining renal function causes accumulation of active metabolites (morphine-6-glucuronide from morphine can accumulate and cause prolonged sedation and myoclonus -- hydromorphone is preferred in renal failure because it has no active metabolites); declining cardiac output reduces drug distribution; dehydration increases drug concentrations. (5) Deprescribing: medications no longer contributing to comfort should be systematically discontinued -- statins, antihypertensives, oral hypoglycemics, bisphosphonates, vitamins, and preventive medications serve no purpose in actively dying patients and contribute to pill burden and side effects. The NP must be comfortable prescribing controlled substances for comfort, managing family expectations about medication effects, and documenting the clinical rationale for EOL medication decisions.