A white pill debossed with EP 905 on one side and 1 on the back is a generic formulation of Lorazepam 1 mg. Commonly recognized under the brand name Ativan, it belongs to the class of medications known as benzodiazepines.
Because lorazepam affects central nervous system activity, it is classified as a Schedule IV (CIV) controlled substance in the United States due to its potential for misuse, physical dependence, and addiction.
Pill Identification & Brand Details
Characteristic Specification
- Brand Equivalent – Ativan
- Active Ingredient – Lorazepam (1 mg)
- Imprint Code –
EP 905(scored front) /1(back) - Drug Class – Benzodiazepine / Anxiolytic
- Color – White
- Shape – Round, flat-faced, beveled edge
- Primary Manufacturer – Leading Pharma, LLC / Exelan Pharmaceuticals
- Controlled Substance Class – Schedule IV (CIV)
- Note: Pill imprints serve as unique identifiers required by the FDA. Always verify unidentified medications with a licensed pharmacist or healthcare provider before consumption.
Indications & Medical Uses
Lorazepam 1 mg is prescribed for several clinical applications:
- Anxiety Disorders: Indicated for the management of generalized anxiety disorder (GAD) or short-term relief of severe anxiety symptoms.
- Pre-anesthetic Medication: Used prior to surgery or surgical procedures to reduce anxiety, produce sedation, and induce amnesia for the procedure.
- Insomnia: Prescribed for short-term management of insomnia caused by anxiety or temporary stress.
- Seizure Control (Off-label / Parenteral Primary): While injectable lorazepam is a first-line treatment for status epilepticus, oral tablets are sometimes used as adjunctive maintenance therapy for certain seizure disorders.
Mechanism of Action
Lorazepam works as a central nervous system depressant by enhancing the inhibitory effects of gamma-aminobutyric acid (GABA), the principal inhibitory neurotransmitter in the brain:
- Selective Receptor Binding: Lorazepam binds to a specific allosteric site on the receptor complex in the central nervous system.
- Enhancement of Inhibitory Signals: Binding increases the receptor’s affinity for GABA, opening chloride channels more frequently. The resulting influx of chloride ions hyperpolarizes the postsynaptic neuron, reducing neuronal excitability throughout the brain.
- Therapeutic Effects: This widespread reduction in neural firing produces anxiolytic (anti-anxiety), sedative, muscle-relaxant, and anticonvulsant effects.
Dosage & Administration
Dosage must be strictly individualized based on age, symptom severity, and patient response.
Standard Adult Dosage for Anxiety:
- Initial doses typically range from 2 mg to 3 mg daily, divided into 2 or 3 doses throughout the day (e.g., one 1 mg tablet taken two to three times daily).
- The total daily dose usually ranges between 1 mg and 10 mg daily.
Dosage for Insomnia Due to Anxiety:
- A single daily dose of 1 mg to 2 mg taken at bedtime.
Elderly or Debilitated Patients:
- Initial dosage is usually reduced to 0.5 mg to 1 mg daily in divided doses to prevent excessive sedation or impaired motor coordination.
- Administration: Can be taken with or without food. Tablets can be split along the score line if a 0.5 mg dose is prescribed.
Side Effects
Because benzodiazepines suppress central nervous system activity, side effects typically involve cognitive or motor slowing:
Common Side Effects
- Sedation / Drowsiness
- Dizziness or Lightheadedness
- Unsteadiness or Ataxia (impaired coordination and balance)
- Weakness or Muscle Fatigue
- Confusion or Memory Impairment (anterograde amnesia)
Severe Side Effects (Seek Immediate Medical Attention)
- Respiratory Depression: Abnormally slow or shallow breathing.
- Paradoxical Reactions: Unexpected agitation, excitation, severe anxiety, or hallucinations.
- Severe Allergic Reactions: Swelling of the face, lips, tongue, or throat; difficulty swallowing or breathing.
- Depression / Suicidal Ideation: Worsening mood, severe lethargy, or thoughts of self-harm.
Precautions & Drug Interactions
- Concomitant CNS Depressants: Combining lorazepam with alcohol, sleep medications, muscle relaxants, or other sedatives significantly increases the risk of severe sedation, coma, and respiratory failure.
- Driving and Operating Machinery: Due to reduced reflexes and drowsiness, patients should avoid driving or operating dangerous equipment until they understand how the drug affects them.
- Pre-existing Health Conditions:
- Respiratory Compromise: Use with extreme caution in patients with COPD, sleep apnea, or other respiratory disorders.
- Renal or Hepatic Impairment: Requires dose reduction and close monitoring due to altered drug clearance.
- Glaucoma: Contraindicated in patients with acute narrow-angle glaucoma.
FDA Black Box Warnings & Addiction Risk
FDA BLACK BOX WARNINGS FOR BENZODIAZEPINES
- Risks from Concomitant Use with Opioids: Taking benzodiazepines like lorazepam alongside opioid medications or illicit opioids can result in severe sedation, respiratory depression, coma, and death.
- Abuse, Misuse, and Addiction: Lorazepam exposes users to the risks of abuse, misuse, and addiction, which can lead to overdose or death. Assess each patient’s risk prior to prescribing.
- Physical Dependence and Withdrawal: Continued use can lead to physical dependence. Abrupt cessation or rapid dose reduction can trigger life-threatening withdrawal symptoms, including grand mal seizures, severe tremors, psychosis, delirium, and severe rebound anxiety. Tapering must always be conducted under strict medical supervision.
- Pregnancy & Breastfeeding: Lorazepam crosses the placenta and is excreted in human milk. Use during pregnancy is generally avoided due to the risk of congenital malformations and neonatal withdrawal/sedation syndromes. Breastfeeding while taking lorazepam is not recommended.