Anxiety and Its Control Flashcards
Immediate Acting Antianxiety Agents
Benzodiazepines, Barbiturates, Alcohol, Beta Blockers (ex. Panic attacks)
Delayed Action Antianxiety Agents
Antidepressant drugs, Buspirone (ex. Medical anxiety)
Benzodiazepine Effects
Diazepam (Valium)
Relief of Anxiety (Tame animals), Sedation, Hypnosis (Large TI 70+) > Limited REM suppression, Amnesia, Anticonvulsant (Medically induced), Muscle Relaxant, Controls gagging and vomiting, Minimal effect on heart and respiration (Lost safety margin with combination of drugs; Exception = Midazolam - Between Benzodiazepine and Barbiturate), Treatment of alcohol withdrawal - chlordiazepoxide, May contribute to mild analgesia, Adjunct treatment in psychiatry
Diazepam
(Valium); Benzodiazepine; Very Fast onset; Single dose, behavioral, 6hr, multidose, blood level up to 200; Long active metabolites; Used for antianxiety, anticonvulsant, sedation and hypnotic, muscle relaxant, amnesia; Mild respiratory depression - may be lethal when combined with other depressants, Amesia; Class D pregnancy
Triazolam
(Halcion); Benzodiazepine; Fast onset; 2-3hr duration half-life; Short active metabolites; Hypnotic, Used for antianxiety, anticonvulsant, sedation and hypnotic, muscle relaxant, amnesia; Amnesia; Class X pregnancy
Midazolam
(Versed); Benzodiazepine; Fast onset; 1-12hr duration; Short active metabolites; Pre-anesthesia and conscious sedation, given parenterally; Overdose can cause respiratory depression and result in death; Amnesia; Class D pregnancy; pH4 - water/lipid soluble, More efficacy binds to receptor than Diazepam, Possible platelet aggregation, Status epilepticus/Local anesthetic induced seizures, IV, IM, Intranasal, Intrabuccal
Flurazepam
(Dalmane); Benzodiazepine; Inter med. onset; Multidose, Up to 100hr duration; Long active metabolites; Hypnotic (Similar to diazepam); Amnesia, Class X pregnancy
Alprazolam
(Xanax); Benzodiazepine; Rapid onset; 12-15hr duration; Short active metabolites; May have antidepressant properties; Not much amnesia; Class D pregnancy
Clonazepam
(Klonopin); Benzodiazepine; Slow onset; 24hr duration; Used as anticonvulsant; Partial agonist; Class D pregnancy
Chlordiazepoxide
(Librium); Benzodiazepine; Inter med. onset; 5-30hr duration; Long active metabolites; Withdrawal; Minimal respiratory depression, Amnesia
Lorazepam
(Ativan); Benzodiazepine; Int. (2hrs) onset; 10-18hr duration; Pre-op sedation in elderly; Mild respiratory depression; Amnesia, Class D pregnancy
Oxazepam
(Serax); Benzodiazepine; Int.Slow onset; 5-13hr onset; Pre-op sedation in elderly; Mild respiratory depression; Amnesia; Class D pregnancy
Benzodiazepine Warnings and Contraindications
Sedation, Amnesia, Paradoxical excitation, Allergy, Avoid use in pregnancy class - D,X, Venous thrombosis (IV - Diazepam), Increase drug metabolizing enzymes, Altered kinetics in liver or kidney failure (Black box warning), Pulmonary disease (COPD, Myesthinia gravis, Sleep Apnea), Respiratory depression - Midazolam, Narrow angle glaucoma BB, Tolerance and dependence, Drug interactions
Benzodiazepine Drug Interactions - Physiologic Stimulants and Depressants
Stimulants: Nicotine, Caffiene, Methylphenidate, Amphetamine, Cocaine
Depressants: Sedatives, Anesthetics, Opiates, Neurologics (decrease Benzodiazepine safety)
Benzodiazepine Drug Interactions - Drugs Inhibiting Metabolism of Benzodiazepines
Erythromycins (Midazolam, Alprazolam, Triazolam), Diltiazam and Verapamil (Substrates for CYP3A4), Azole Antifungals (Diazepam + Fluconazole = 2.5XDiazepam); Grapefruit juice (Midazolam, Alprazolam, Triazolam); Cimetidine, Oral contraceptive, Fluoxetine (SSRI); Propoxyphene, Propranolol; Isoniazd, Vaproic acid
Smoking with Benzodiazepine
(Antagonizes sedation)