Bromazepam
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
| Target | Action | Gene / 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
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
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
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 pearl | Respiratory, cardiovascular, and mental status; periodic CBC and liver function tests |
|---|
Chemistry & Properties
| Formula | C14H10BrN3O |
|---|---|
| Molecular weight | 316.16 g/mol |
| IUPAC name | 7-bromo-5-pyridin-2-yl-1,3-dihydro-1,4-benzodiazepin-2-one |
| CAS | 1812-30-2 |
| PubChem CID | 2441 |
| InChIKey | VMIYHDSEFNYJSL-UHFFFAOYSA-N |
| logP | 2.63 (XLogP 1.7) |
| Polar surface area | 54.35 Ų |
| H-bond acceptors / donors | 3 / 1 |
| Drug-likeness (QED) | 0.88 |
| Lipinski violations | 0 |
SMILES
O=C1CN=C(c2ccccn2)c2cc(Br)ccc2N1Biology & Pharmacokinetics
Pharmacokinetics
| BBB penetrant | Yes |
|---|
Enzyme interactions
| Enzyme | Role | Detail |
|---|---|---|
| CYP1A2 | Substrate | — |
| CYP3A4 | Substrate | — |
Transporters
BCRP (Inhibitor)BSEP (Inhibitor)MRP1 (Inhibitor)OATP1B1 (Inhibitor)OATP1B3 (Inhibitor)P-gp (Inhibitor)P-gp (Substrate)
Registered Products (14)
| Brand | Form / strength | Pack | Agent | Citizen (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 |