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Lorazepam

Brand and Other Names: Ativan
Mechanism of Action:
Indications:
Ativan (lorazepam) is indicated for the management of anxiety disorders or for the short-term relief of the symptoms of anxiety or anxiety associated with depressive symptoms. Anxiety or tension associated wit the stress of everyday life usually does not require treatment with an anxiolytic. The effectiveness of Ativan (lorazepam) in long-term use, that is, more than 4 months, has not been assessed by systematic clinical studies. The physician should periodically reassess the usefulness of the drug for the individual patient.
Route: Oral
Dose:
For optimal results, dose, frequency of administration, and duration of therapy should be individualized according to patient response. To facilitate this, 0.5 mg, 1 mg, and 2 mg tablets are available. The usual range is 2 to 6 mg/day given in divided doses, the largest dose being taken before bedtime, but the daily dosage may vary from 1 to 10 mg/day. For anxiety, most patients require an initial dose of 2 to 3 mg/day given two times a day or three times a day. For insomnia due to anxiety or transient situational stress, a single daily dose of 2 to 4 mg may be given, usually at bedtime. For elderly or debilitated patients, an initial dosage of 1 to 2 mg/day in divided doses is recommended, to be adjusted as needed and tolerated. The dosage of Ativan (lorazepam) should be increased gradually when needed to help avoid adverse effects. When a higher dosage is indicated, the evening dose should be increased before the daytime doses.
Adverse Reactions:
Most adverse reactions to benzodiazepines, including CNS effects and respiratory depression, are dose dependent, with more severe effects occurring with high doses. In a sample of about 3500 patients treated for anxiety, the most frequent adverse reaction to Ativan (lorazepam) was sedation (15.9%), followed by dizziness (6.9%), weakness (4.2%), and unsteadiness (3.4%). The incidence of sedation and unsteadiness increased with age. See package insert for complete information.
Contraindication:

Ativan (lorazepam) is contraindicated in patients with:
• hypersensitivity to benzodiazepines or to any components of the formulation
• acute narrow-angle glaucoma.

Warnings and Precautions:
In patients with depression, the possibility for suicide should be borne in mind; benzodiazepines should not be used in such patients without adequate antidepressant therapy. Lorazepam should be used with caution in patients with compromised respiratory function (e.g., COPD, sleep apnea syndrome). Elderly or debilitated patients may be more susceptible to the sedative effects of lorazepam. Therefore, these patients should be monitored frequently and have their dosage adjusted carefully according to patient response; the initial dosage should not exceed 2 mg. Paradoxical reactions have been occasionally reported during benzodiazepine use. Such reactions may be more likely to occur in children and the elderly. Should these occur, the use of the drug should be discontinued. See package insert for complete information.
See package insert for full prescribing information.