What Is Midazolam? Uses, Dosage, and What You Need to Know in 2026

Midazolam is one of the most widely used medications in modern medicine — yet many patients have never heard of it by name. If you've ever had surgery, a colonoscopy, or a procedure under sedation, there's a good chance midazolam was part of your care. And if you or a family member has epilepsy, you may know it by the brand name Nayzilam. Here's a complete overview of what midazolam is, what it does, and what you need to know.

What Is Midazolam?

Midazolam is a short-acting benzodiazepine — a class of medications that calm the central nervous system. It was first approved by the FDA in 1985 and is now on the World Health Organization's List of Essential Medicines, reflecting its global importance in healthcare. It's available as a generic medication in multiple formulations and under several brand names.

Key brand names include:

Versed: The original US brand name for injectable and oral syrup forms (now discontinued; generics widely available)

Nayzilam: A 5 mg nasal spray approved for treating seizure clusters in patients 12+ years (manufactured by UCB)

Seizalam: An intramuscular injection approved for treating status epilepticus

What Is Midazolam Used For?

Midazolam is FDA-approved for several indications:

Procedural sedation: Before surgeries, endoscopies, colonoscopies, dental procedures, and other minor operations. It reduces anxiety, causes drowsiness, and produces temporary memory loss (amnesia) for the procedure.

Anesthesia induction: IV midazolam is commonly used at the start of general anesthesia to help patients go to sleep smoothly before other anesthetic agents are given.

ICU sedation: Continuous IV infusion is used to keep mechanically ventilated patients comfortable in the ICU. Midazolam is the most popular benzodiazepine in the ICU due to its short half-life (about 3 hours) and water solubility.

Seizure rescue (Nayzilam): The nasal spray form is used as an emergency medication to stop seizure clusters in epilepsy patients 12 and older.

Status epilepticus (Seizalam): The IM injection form is used by paramedics and first responders when IV access is unavailable.

Pediatric pre-procedure sedation (oral syrup): The 2 mg/mL oral syrup is FDA-approved to help children relax and feel less anxious before procedures.

What Forms Does Midazolam Come In?

Injectable solution: 1 mg/mL and 5 mg/mL vials for IV or IM use; also available premixed in saline (1 mg/mL in 0.9% NaCl, 50–500 mL bags)

Oral syrup: 2 mg/mL (typically dispensed as a 118 mL bottle)

Nasal spray (Nayzilam): 5 mg per 0.1 mL unit-dose device

How Is Midazolam Dosed?

Dosing varies significantly by indication, patient age, weight, and health status. Key principles:

IV sedation (adults): Initial doses as low as 0.5–1 mg; maximum 2.5 mg per initial dose, given slowly over at least 2 minutes

Pediatric oral syrup: 0.25–0.5 mg/kg (max 20 mg), given 30–45 minutes before procedure

Nayzilam nasal spray: 5 mg in one nostril; may repeat 5 mg in the other nostril after 10 minutes if no response; maximum 10 mg per episode, max 1 episode per 3 days

Is Midazolam a Controlled Substance?

Yes. Midazolam is a DEA Schedule IV controlled substance because it has the potential for abuse, misuse, and dependence. Schedule IV means it has accepted medical use but carries a lower potential for abuse compared to Schedule I–III drugs. You need a valid prescription from a licensed prescriber to obtain it, and pharmacies must follow special dispensing and record-keeping rules.

How Long Does Midazolam Stay in Your System?

Midazolam has an elimination half-life of approximately 1.8 to 6.4 hours (average about 3 hours) in healthy adults. This means most of the drug is cleared from your system within 8–12 hours, though sedative effects typically last 1–6 hours depending on dose and route. Elderly patients, those with liver disease, and ICU patients on prolonged infusions may experience significantly longer effects.

To learn more about how midazolam works in the body, read: How Does Midazolam Work? Mechanism of Action Explained.