Midazolam Puren (Midazolam Hydrochloride)

Midazolam is a benzodiazepine that acts on the central nervous system to produce sedation and seizure control.

• Procedural sedation: enables moderate to deep sedation during diagnostic or therapeutic procedures.
• Pre‑operative anxiolysis: reduces anxiety and facilitates smooth induction of anesthesia before surgery.
• Induction of anesthesia: provides rapid onset sedation to assist airway management and anesthesia induction.
• Acute seizure control: terminates or reduces the severity of generalized tonic‑clonic seizures in emergency settings.

• Midazolam binds to the benzodiazepine site on the GABA‑A receptor complex, increasing the frequency of chloride channel opening. This potentiates the inhibitory effect of GABA, leading to enhanced neuronal hyperpolarisation, reduced excitatory neurotransmission, and the clinical manifestations of sedation, anxiolysis, muscle relaxation, and anticonvulsant activity.

Adverse reactions may vary in frequency and severity.

Common Side Effects

• Drowsiness or excessive sleepiness
• Dizziness or light‑headedness
• Anterograde amnesia
• Respiratory depression, especially at higher doses
• Hypotension or mild cardiovascular instability
• Nausea or vomiting

Serious or Rare Side Effects

• Paradoxical reactions such as agitation or aggression
• Severe respiratory compromise requiring ventilation
• Anaphylactic or severe allergic reactions
• Profound hypotension or cardiovascular collapse
• Skin reactions like Stevens‑Johnson syndrome or toxic epidermal necrolysis

Midazolam requires careful patient assessment and monitoring.

• Dose adjustment in elderly: reduce initial dose due to increased sensitivity and slower clearance.
• Respiratory depression risk: avoid use in patients with compromised airway or severe pulmonary disease without adequate monitoring.
• Concomitant CNS depressants: limit combined use with opioids, barbiturates, or alcohol to prevent additive sedation.
• Pregnancy and lactation: use only if benefits outweigh potential risks, as safety data are limited.
• Storage: Store below 25°C: keep in original container, protect from moisture.

Midazolam may interact with other medications that affect the central nervous system or its metabolism.

Major Interactions (Avoid)

• Opioids (e.g., fentanyl, morphine): additive respiratory depression.
• Other benzodiazepines or barbiturates: profound sedation and respiratory compromise.
• Alcohol: enhanced CNS depression.
• CNS depressant antihistamines (e.g., diphenhydramine): increased drowsiness.
• Potent CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): may raise plasma levels.

Moderate Interactions (Monitor Closely)

• CYP3A4 inducers (e.g., rifampicin, carbamazepine): may reduce efficacy.
• Antidepressants (e.g., fluoxetine, sertraline): may increase sedation.
• Antihypertensives: additive hypotensive effect.
• Anticholinergic agents: may exacerbate confusion in the elderly.
• Herbal supplements like St. John’s Wort: possible reduction in drug exposure.