Toxicology and Urine Drug Testing (UDT)

For the pain physician, Urine Drug Testing (UDT) is not a tool for “catching” patients; it is a critical safety intervention and an objective component of risk stratification. On the board exams, UDT questions are notoriously high-yield, focusing on the...

NMDA Antagonists and Membrane Stabilizers

As we move toward the more advanced pain pharmacology, we encounter medications that do not merely “numb” pain or “strengthen” inhibition, but instead target the fundamental physiological changes that occur when pain becomes chronic. NMDA...

Muscle Relaxants and Antispasmodics

“Muscle relaxants” are frequently tested, yet the term itself is a clinical misnomer. Most of these medications do not act directly on the muscle fibers; instead, they exert their effects on the central nervous system (CNS). For the clinician, the most...