Rocuronium bromide should be administered only by anaesthetists familiar with the use of neuromuscular blocking agents and when facilities for controlled ventilation, insufflation with oxygen and tracheal intubation are available for immediate use.
Appropriate Administration and Monitoring
Since Rocuronium bromide causes paralysis of the respiratory muscles, ventilatory support is mandatory for patients treated with this medicinal product until adequate spontaneous respiration is restored.
As with all neuromuscular blocking agents, it is important to anticipate intubation difficulties, particularly when used as part of a rapid sequence induction technique. In the case of intubation difficulties resulting in a clinical need for immediate reversal of rocuronium induced neuromuscular block, the use of a reversal agent should be considered.
Residual Curarization
As with other neuromuscular blocking agents, residual curarization has been reported for Rocuronium bromide. In order to prevent complications resulting from residual curarization, it is recommended to extubate only after the patient has recovered sufficiently from neuromuscular block. Geriatric patients (65 years or older) may be at increased risk for residual neuromuscular block. Other factors which could cause residual curarization after extubation in the post-operative phase (such as drug interactions or patient condition) should also be considered. If not used as part of standard clinical practice, the use of a reversal agent (such as sugammadex or acetylcholinesterase inhibitors) should be considered, especially in those cases where residual curarization is more likely to occur.
Anaphylaxis
Anaphylactic reactions can occur following the administration of neuromuscular blocking agents. Precautions for treating such reactions should always be taken. Particularly in the case of previous anaphylactic reactions to neuromuscular blocking agents, special precautions should be taken since allergic cross-reactivity to neuromuscular blocking agents has been reported.
Use in an Intensive Care Unit
In general, following long term use of neuromuscular blocking agents in the ICU, prolonged paralysis and/or skeletal muscle weakness has been noted. In order to help preclude possible prolongation of neuromuscular block and/or overdosage it is strongly recommended that neuromuscular transmission is monitored throughout the use of neuromuscular blocking agents. In addition, patients should receive adequate analgesia and sedation. Furthermore, neuromuscular blocking agents should be titrated to effect in the individual patients by or under supervision of experienced clinicians who are familiar with their actions and with appropriate neuromuscular monitoring techniques.
Myopathy after long term administration of other non-depolarizing neuromuscular blocking agents in the ICU in combination with corticosteroid therapy has been reported regularly. Therefore, for patients receiving both neuromuscular blocking agents and corticosteroids, the period of use of the neuromuscular blocking agent should be limited as much as possible.
Use with Suxamethonium
If suxamethonium is used for intubation, the administration of Rocuronium bromide should be delayed until the patient has clinically recovered from the neuromuscular block induced by suxamethonium.
Because rocuronium bromide is always used with other drugs and because of the risk of malignant hyperthermia during anaesthesia, even in the absence of known triggering factors, physicians should be aware of the early symptoms, confirmatory diagnosis and treatment of malignant hyperthermia prior to the start of anaesthesia. Animal studies have shown that rocuronium bromide is not a triggering factor for malignant hyperthermia. Rare cases of malignant hyperthermia with rocuronium bromide have been observed through post-marketing surveillance however, the causal association has not been proven.
The following conditions may influence the pharmacokinetics and/or pharmacodynamics of Rocuronium bromide:
Hepatic and/or biliary tract disease and renal failure
Because rocuronium is excreted in urine and bile, it should be used with caution in patients with clinically significant hepatic and/or biliary diseases and/or renal failure. In these patient groups prolongation of action has been observed with doses of 0.6 mg/kg rocuronium bromide.
Prolonged circulation time
Conditions associated with prolonged circulation time such as cardiovascular disease, old age and oedematous state resulting in an increased volume of distribution, may contribute to a slower onset of action. The duration of action may also be prolonged due to a reduced plasma clearance.
Neuromuscular disease
Like other neuromuscular blocking agents, Rocuronium bromide should be used with extreme caution in patients with a neuromuscular disease or after poliomyelitis since the response to neuromuscular blocking agents may be considerably altered in these cases. The magnitude and direction of this alteration may vary widely. In patients with myasthenia gravis or with the myasthenic (Eaton-Lambert) syndrome, small doses of Rocuronium bromide may have profound effects and Rocuronium bromide should be titrated to the response.
Hypothermia
In surgery under hypothermic conditions, the neuromuscular blocking effect of Rocuronium bromide is increased and the duration prolonged.
Obesity
Like other neuromuscular blocking agents, Rocuronium bromide may exhibit a prolonged duration and a prolonged spontaneous recovery in obese patients when the administered doses are calculated on actual body weight.
Burns
Patients with burns are known to develop resistance to non-depolarising neuromuscular blocking agents. It is recommended that the dose is titrated to response.
Conditions which may increase the effects of Rocuronium bromide
Hypokalaemia (e.g. after severe vomiting, diarrhoea and diuretic therapy), hypermagnesemia, hypocalcaemia (after massive transfusions), hypoproteinaemia, dehydration, acidosis, hypercapnia, cachexia.
Severe electrolyte disturbances altered blood pH or dehydration should therefore be corrected when possible.
Hypertensive crisis in patients with phaeochromocytoma
Postmarketing data have identified cases of hypertensive crisis temporally related to administration of rocuronium in patients with diagnosed or latent phaeochromocytoma. Rocuronium should therefore be used with caution in such patients.
This medicine contains less than 1 mmol sodium (23 mg) per vial/ampoule, that is to say essentially “sodium-free”.