title: When should plasma drug levels be monitored?
mesh_terms: D000889:Anti-Arrhythmia Agents / Q000097:blood; D000906:Antibodies / Q000097:blood; D000925:Anticoagulants / Q000097:blood; D000927:Anticonvulsants / Q000097:blood; D000929:Antidepressive Agents, Tricyclic / Q000097:blood; D001682:Biological Availability; D001798:Blood Proteins / Q000378:metabolism; D004077:Digoxin / Q000097:blood; D006801:Humans; D007700:Kinetics; D008094:Lithium / Q000097:blood; D008991:Monitoring, Physiologic; D010349:Patient Compliance; D004364:Pharmaceutical Preparations / Q000008:administration & dosage / Q000097:blood*; D011485:Protein Binding; D013806:Theophylline / Q000097:blood
chemical_list: D000889:Anti-Arrhythmia Agents; D000906:Antibodies; D000925:Anticoagulants; D000927:Anticonvulsants; D000929:Antidepressive Agents, Tricyclic; D001798:Blood Proteins; D004364:Pharmaceutical Preparations; D004077:Digoxin; D008094:Lithium; D013806:Theophylline