New Release: Alpha testing version has been released.

Bromazepam

N05B - Anxiolytics ATC N05BA08 Small molecule Natural product

JFDA label: Lexopam 6 Tablets

Mechanism of Action

Positive Allosteric Modulator of Gamma-aminobutyric acid receptor subunit alpha-2 — GABA receptor alpha-2 subunit positive allosteric modulator

TargetActionGene / class
Gamma-aminobutyric acid receptor subunit alpha-2 efficacy POSITIVE ALLOSTERIC MODULATOR GABRA2

Indications

Approved

  • Anxiety

Contraindications

Source: Lexicomp

  • Hypersensitivity to bromazepam, other benzodiazepines, or any component of the formulation Absolute
  • myasthenia gravis Absolute
  • narrow-angle glaucoma Absolute
  • severe hepatic or respiratory disease Absolute
  • sleep apnea Absolute

Adverse Reactions

Very Common >10%Common 1–10%Uncommon 0.1–1% Rare 0.01–0.1%Very Rare <0.01%Not Known

Cardiac disorders (4)

Not Known Cardiac arrest · hypotension · palpitations · tachycardia

Nervous system disorders (12)

Not Known Ataxia · confusion · depression · dizziness · drowsiness · emotional lability · euphoria · fatigue · headache · impaired consciousness · myasthenia · seizure

Hepatobiliary disorders (4)

Not Known Increased serum alkaline phosphatase · increased serum ALT · increased serum AST · increased serum bilirubin

Renal and urinary disorders (1)

Not Known Urinary incontinence

Blood and lymphatic system disorders (4)

Not Known Decreased hematocrit · decreased hemoglobin · decreased white blood cell count · increased WBC count

Metabolism and nutrition disorders (3)

Not Known Change in libido · decreased serum glucose · increased serum glucose

Gastrointestinal disorders (4)

Not Known Gastrointestinal distress · nausea · vomiting · xerostomia

Skin and subcutaneous tissue disorders (2)

Not Known Pruritus · skin rash

Musculoskeletal and connective tissue disorders (1)

Not Known Muscle spasm

Eye disorders (2)

Not Known Blurred vision · diplopia

Respiratory, thoracic and mediastinal disorders (1)

Not Known Respiratory depression

Dosing

Source: Lexicomp

Anxiety: Oral: Initial: 6 to 18 mg/day in equally divided doses. Initial course of treatment should not last longer than 1 week. without reassessment of the need for a limited extension. Optimal dosage range: 6 to 30 mg/day. Limited experience with doses up to 60 mg/day. Debilitated patients: Oral: Initial dose: 3 mg/day in divided doses; may adjust dose cautiously based on response and tolerance
Anxiety: Oral: Initial dose: 3 mg/day in divided doses; may adjust dose cautiously based on response and tolerance
There are no dosage adjustments provided in the manufacturer’s labeling; initiate therapy conservatively and titrate cautiously.
Mild to moderate impairment: There are no dosage adjustments provided in the manufacturer’s labeling; initiate therapy conservatively and titrate cautiously. Severe impairment: Use is contraindicated.

Warnings & Precautions

Source: Lexicomp

Anterograde amnesia

Benzodiazepines have been associated with anterograde amnesia (Nelson, 1999).

CNS depression

May cause CNS depression, which may impair physical or mental abilities; effects may be potentiated by other CNS depressants, psychoactive medication, or ethanol. Patients must be cautioned about performing tasks which require mental alertness (eg, operating machinery or driving).

Paradoxical reactions

Paradoxical reactions, including hyperactive or aggressive behavior, have been reported with benzodiazepines (Mancuso, 2004).

Sleep-related activities

An increased risk for hazardous sleep-related activities such as sleep-driving, cooking and eating food, and making phone calls while asleep have been noted with benzodiazepines (Dolder, 2008). Disease-related concerns:

Depression

Use is not recommended in patients with depressive disorders or psychosis.

Drug abuse

Use with caution in patients with a history of drug abuse or acute alcoholism; potential for drug dependency exists. Tolerance, psychological and physical dependence may occur with prolonged use.

Hepatic impairment

Use with caution in patients with mild or moderate hepatic impairment. Use is contraindicated in severe impairment

Renal impairment

Use with caution in patients with renal impairment.

Respiratory disease

May cause respiratory depression; use with caution particularly in patients with preexisting or chronic respiratory disease and concomitantly with other respiratory depressive agents. Use is contraindicated with severe disease. Special populations:

Debilitated patients

Use with caution in debilitated patients.

Fall risk

Use with extreme caution in patients who are at risk of falls (elderly); benzodiazepines have been associated with falls and traumatic injury. Dosage form specific issues:

Lactose

May contain lactose; do not use with galactose intolerance, Lapp lactase deficiency, or glucose-galactose malabsorption syndromes. Concurrent drug therapy issues:

Drug-drug interactions

Potentially significant interactions may exist, requiring dose or frequency adjustment, additional monitoring, and/or selection of alternative therapy. Consult drug interactions database for more detailed information. Other warnings/precautions:

Appropriate use

Does not have analgesic, antidepressant, or antipsychotic properties.

Withdrawal

Rebound or withdrawal symptoms may occur following abrupt discontinuation or large decreases in dose. Use caution when reducing dose or withdrawing therapy; decrease slowly and monitor for withdrawal symptoms. Flumazenil may cause withdrawal in patients receiving long-term benzodiazepine therapy.

Pregnancy & Lactation

Pregnancy

Adverse events were observed in animal reproduction studies. Benzodiazepines have the potential to cause harm to the fetus. An increased risk of fetal malformations may be associated with first trimester exposure (malformations of the heart, cleft lip/palate). Maternal use later in pregnancy may be associated with adverse events in the fetus (irregular heart beat) and neonate (hypothermia, hypotonia, respiratory depression, poor feeding, withdrawal).

Lactation

Avoid

Bromazepam and metabolites are expected to be found in breast milk, therefore, use while breast-feeding is not recommended by the manufacturer. Drowsiness, lethargy, or weight loss in nursing infants have been observed in case reports following maternal use of some benzodiazepines (Iqbal, 2002).

Monitoring

Clinical pearlRespiratory, cardiovascular, and mental status; periodic CBC and liver function tests

Chemistry & Properties

2D structure
FormulaC14H10BrN3O
Molecular weight316.16 g/mol
IUPAC name7-bromo-5-pyridin-2-yl-1,3-dihydro-1,4-benzodiazepin-2-one
CAS1812-30-2
PubChem CID2441
InChIKeyVMIYHDSEFNYJSL-UHFFFAOYSA-N
logP2.63 (XLogP 1.7)
Polar surface area54.35 Ų
H-bond acceptors / donors3 / 1
Drug-likeness (QED)0.88
Lipinski violations0
SMILESO=C1CN=C(c2ccccn2)c2cc(Br)ccc2N1

Biology & Pharmacokinetics

Pharmacokinetics

BBB penetrantYes

Enzyme interactions

EnzymeRoleDetail
CYP1A2Substrate
CYP3A4Substrate

Transporters

BCRP (Inhibitor)BSEP (Inhibitor)MRP1 (Inhibitor)OATP1B1 (Inhibitor)OATP1B3 (Inhibitor)P-gp (Inhibitor)P-gp (Substrate)

Registered Products (14)

BrandForm / strengthPackAgentCitizen (JOD)
Novepam- Tablet 1.5 mg 30 tab pack varies AL-RAM PHARMA.INDUS.CO.LTD/JORDAN 1.500
Lexopam 1.5 Tablets Tablet 1.5 mg 30 tab pack varies UNITED PHARM.MFG.CO.LTD(UPM)/JORDAN 1.620
Novepam- Tablet 3 mg 30 tab pack varies AL-RAM PHARMA.INDUS.CO.LTD/JORDAN 2.150
Lexopam 3 Tablets Tablet 3 mg 30 tab pack varies UNITED PHARM.MFG.CO.LTD(UPM)/JORDAN 2.290
AKAMON TAB Tablet 3 mg 40 tab Khoury Drug Store 2.770
LEXOTANIL TAB Tablet 1.5 mg 30 tab Shawi & Rushedat Drug Store 2.780
Novepam- Tablet 6 mg 30 tab AL-RAM PHARMA.INDUS.CO.LTD/JORDAN 3.000
Lexopam 6 Tablets Tablet 6 mg 30 tab UNITED PHARM.MFG.CO.LTD(UPM)/JORDAN 3.340
LEXOTANIL TAB Tablet 3 mg 30 tab Shawi & Rushedat Drug Store 3.390
LEXOTANIL TAB Tablet 6 mg 30 tab Shawi & Rushedat Drug Store 4.290
Lexopam 1.5 Tablets Tablet 1.5 mg 1000 tab pack varies UNITED PHARM.MFG.CO.LTD(UPM)/JORDAN 40.000
Novepam-1.5 mg tablets Tablet 1.5 mg 1000 tab pack varies AL-RAM PHARMA.INDUS.CO.LTD/JORDAN 42.500
Lexopam 3 Tablets Tablet 3 mg 1000 tab pack varies UNITED PHARM.MFG.CO.LTD(UPM)/JORDAN 57.330
Novepam- Tablet 3 mg 1000 tab pack varies AL-RAM PHARMA.INDUS.CO.LTD/JORDAN 57.550