| Drug class |
Benzodiazepine – short‑acting, centrally‑acting hypnotic, anxiolytic, and anticonvulsant. |
| Typical formulation |
1 mg/mL (0.1 % w/v) or 5 mg/mL (0.5 % w/v) midazolam solution for injection, diluted in 0.9 % NaCl (normal saline) for IV use. |
| Common uses |
• Sedation for procedural or diagnostic imaging (e.g., endoscopy, CT, MRI).
• Pre‑operative sedation or anxiolysis.
• Adjunct to general anesthesia.
• Treatment of acute seizures or status epilepticus (bolus + continuous infusion). |
| Typical dosing (IV) |
• Bolus 0.02–0.1 mg/kg (maximum 2 mg) for sedation or seizure control.
• Infusion 0.05–0.1 µg/kg/min for procedural sedation; for seizures, 0.15–0.5 mg/kg/h.
• Adjustment based on age, organ function, and concurrent medications. |
| Dilution & Administration |
1 mg of midazolam is usually reconstituted with 1 mL sterile water or 2 mL sterile saline to give a 0.5 % or 0.25 % solution, then diluted to a final concentration of 0.1 mg/mL or 0.5 mg/mL in 0.9 % NaCl.
• Use a dedicated IV line; avoid mixing with other agents unless protocol‑approved.
• Keep the solution refrigerated (2–8 °C) if not used immediately; discard after 24 h if stored in the refrigerator. |
| Monitoring |
• Level of sedation (Ramsay, Ramsay‑Sedation Score, or Bispectral Index).
• Respiratory rate, oxygen saturation, and capnography.
• Blood pressure and heart rate (midazolam can cause transient hypotension). |
| Contraindications |
• Known hypersensitivity to midazolam or other benzodiazepines.
• Severe respiratory failure, chronic obstructive pulmonary disease (COPD) exacerbation, or severe asthma.
• Acute glaucoma, severe hepatic dysfunction (especially with prolonged infusion). |
| Drug interactions |
• CNS depressants (opioids, alcohol, antihistamines).
• CYP3A4 inhibitors (ketoconazole, erythromycin) can increase midazolam levels.
• CYP3A4 inducers (rifampin, carbamazepine) can lower efficacy. |
| Adverse effects |
• Respiratory depression, hypotension, paradoxical agitation or delirium, muscle weakness.
• Post‑operative nausea/vomiting, flushing, metallic taste. |
| Special populations |
• Elderly: increased sensitivity → lower starting dose.
• Pregnancy: Category C; use only if benefits outweigh risks.
• Pediatrics: weight‑based dosing; monitor closely. |
| Legal & dispensing |
• Prescription‑only medication.
• Must be administered under qualified supervision (anesthesiologist, intensivist, or trained nurse). |
| Cost & Discount |
• Prices vary widely by country, manufacturer, pharmacy network, and whether a generic or brand‑name product is used.
• Many health‑systems negotiate bulk purchasing agreements or pharmacy benefit manager (PBM) discounts.
• Patients can often access manufacturer coupons, patient assistance programs, or discount card plans that may reduce out‑of‑pocket costs.
• For the most accurate pricing, consult your local pharmacy, insurance formulary, or a drug‑pricing database. |