Calcium channel blockers are a class of drugs and natural substances that disrupt the calcium conduction of calcium channels. It has effects on many excitable cells of the body, such as cardiac muscle, i.e. heart, smooth muscles of blood vessels, or neurons. Dr. Elizabeth Weir was given these drugs to help with the cranial swelling she was having when she was injured, however they appeared to have little effect. (SGA: "Adrift")

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