Ketamine Injection 500mg

About Ketamine Injection 500mg

Uses

• Induction and maintenance of general anesthesia during surgery
• Procedural sedation for short, painful procedures in emergency and trauma care
• Sedation for burn dressing changes and wound debridement
• Adjunct anesthetic in patients with unstable blood pressure or asthma
• Pain management in select hospital settings under close monitoring

Benefits

• Produces rapid onset of anesthesia within seconds of intravenous administration
• Maintains stable breathing and airway reflexes better than many other anesthetics
• Supports blood pressure and heart rate instead of lowering them
• Provides strong pain relief along with sedation
• Useful in emergency and field settings where equipment is limited

What Experts Say

Anesthesiologists value ketamine for its unique action on NMDA receptors in the brain, which blocks pain signals while keeping the patient's airway reflexes and breathing largely intact. This makes it a preferred choice for short procedures where a breathing tube is not desired, and for patients who are hemodynamically unstable, since it tends to support rather than lower blood pressure and heart rate.

Dosing is calculated strictly by body weight and route, with intravenous doses acting within a minute and intramuscular doses taking slightly longer to produce dissociative anesthesia. Continuous monitoring of oxygen levels, heart rhythm, and blood pressure is standard practice throughout administration and recovery, since emergence reactions and changes in intracranial pressure can occur even at correct doses.

Hospitals across Pakistan rely on ketamine for trauma and burn care, where quick, reliable sedation with a favorable safety margin is essential in resource limited emergency settings. Because of its recognized potential for misuse and dependence, it is classified as a controlled substance and is dispensed and administered only by trained medical staff under strict institutional protocols.

Drug Class

• NMDA receptor antagonist
• Dissociative anesthetic

Ketamine Injection 500mg formula

• Ketamine Hydrochloride 500mg

Available forms

• Injection

How to use Ketamine Injection 500mg?

• Administered only by a qualified anesthesiologist or trained medical staff in a hospital or clinical setting
• Given by slow intravenous injection, intravenous infusion, or intramuscular injection based on the procedure
• Dose is calculated according to the patient's body weight, age, and the type of procedure being performed
• Never self administered or used outside a monitored medical facility
• Continuous monitoring of vital signs is required during and after administration

Drug Interactions

• Increased sedation and breathing suppression when combined with benzodiazepines, opioids, or other central nervous system depressants
• Alcohol increases the risk of excessive drowsiness and slowed breathing
• Theophylline combined with ketamine can lower the seizure threshold
• Thyroid hormone medicines combined with ketamine may cause a marked rise in blood pressure and heart rate
• Other general anesthetics may prolong recovery time when used together with ketamine
• Barbiturates and opioid analgesics can prolong ketamine's sedative effect and delay recovery

Risks and warnings

• Controlled substance with recognized potential for misuse, dependence, and diversion
• Can cause emergence reactions including vivid dreams, hallucinations, confusion, and agitation as the drug wears off
• Should be used with caution in patients with raised intracranial pressure or significant head injury
• Should be used with caution in patients with raised intraocular pressure or penetrating eye injury
• Not recommended for patients with poorly controlled high blood pressure, severe heart disease, or a history of stroke
• Requires airway and resuscitation equipment to be available during administration
• Not to be used in patients with known hypersensitivity to ketamine
• Use in pregnancy and breastfeeding only under direct specialist supervision
• Long term or repeated recreational use has been linked to bladder and urinary tract damage

Ketamine Injection 500mg Side Effects

• Nausea and vomiting
• Increased heart rate and blood pressure during the procedure
• Vivid dreams, hallucinations, or confusion while recovering
• Blurred vision and involuntary eye movements
• Dizziness and unsteady coordination after waking
• Excess salivation
• Injection site pain or redness
• Temporary rash
• Slowed or irregular breathing at higher doses

Storage Conditions

• Store below 25°C in a cool, dry place away from direct sunlight
• Keep the vial in its original carton until ready for use
• Must be stored in a locked, controlled substance cabinet with restricted access, in line with hospital narcotics regulations
• Keep an accurate log of use as required for controlled substances
• Do not use if the solution appears discolored or contains particles
• Keep out of reach of children and unauthorized personnel
• Discard any opened multidose vial according to hospital infection control policy