1. Calcium Channel Blockers A class of drugs that act by selective inhibition of calcium influx through cellular membranes. 2. Analgesics Compounds capable of relieving pain without the loss of CONSCIOUSNESS. 3. Anticonvulsants Drugs used to prevent SEIZURES or reduce their severity. 4. Antiparkinson Agents Agents used in the treatment of Parkinson's disease. The most commonly used drugs act on the dopaminergic system in the striatum and basal ganglia or are centrally acting muscarinic antagonists. 5. Anti-Anxiety Agents Agents that alleviate ANXIETY, tension, and ANXIETY DISORDERS, promote sedation, and have a calming effect without affecting clarity of consciousness or neurologic conditions. ADRENERGIC BETA-ANTAGONISTS are commonly used in the symptomatic treatment of anxiety but are not included here. 6. Antimanic Agents Agents that are used to treat bipolar disorders or mania associated with other affective disorders. 7. Excitatory Amino Acid Antagonists Drugs that bind to but do not activate excitatory amino acid receptors, thereby blocking the actions of agonists. | 
