Possible abuse of the drug
There is a potential risk of abuse of the drug Palexia. This should be taken into account when prescribing the drug in situations where there is a risk of misuse, abuse of the drug or transfer of the drug to others.
All patients treated with mu-opioid receptor agonist drugs are closely monitored for drug abuse and dependence.
Inhibition of respiration
In high doses and in patients with hypersensitivity to agonists of mu-opioid receptors tapentadol can provoke a dose-dependent respiratory depression. For this reason, patients with respiratory function impairment drug Palexia should be administered with caution. Consideration should be given to analgesics not belonging to agonists of mu-opioid receptors, and the drug Palexia in such patients should be used only under close medical supervision and in minimal effective doses. With respiratory depression, treatment should be performed as in the case of respiratory depression against the background of the use of any other agonist of mu-opioid receptors.
Craniocerebral injury and increased intracranial pressure
As with the use of other drugs - agonists of mu-opioid receptors, tapentadol should not be given to patients who may be particularly sensitive to pathophysiological reactions developing with increasing partial pressure of carbon dioxide in the intracranial vessels and brain tissue, for example, with increased intracranial pressure, oppression or coma. Analgesics, characterized by their affinity for mu-opioid receptors, can mask the clinical manifestations of craniocerebral trauma. The drug Palexia should be used with caution in patients with craniocerebral trauma and brain tumors.
Convulsions
A systematic study of tapentadol in patients with convulsive syndrome was not performed. Nevertheless, like other analgesics with an affinity for mu-opioid receptors, the preparation Palexia should be administered with caution to patients with a history of convulsive syndrome or any conditions that put the patient at risk for seizures.
Liver failure
In patients with impaired hepatic function, an increase in serum concentrations of tapentadol was found compared with patients with normal liver function. The drug Palexia should be used with caution in patients with moderate hepatic impairment. The drug Palexia in patients with severe a violation of the liver was not studied, and therefore contraindicated in the use of this group of patients.
Use in the pathology of the pancreas and bile ducts
Drugs that have an affinity for mu-opioid receptors can cause spasm of the sphincter of Oddi. The drug Palexia should be used with caution in patients with pathology of the biliary tract and acute pancreatitis.
The "cancellation" syndrome
With the simultaneous discontinuation of taking tapentadol, the syndrome of "cancellation" is possible. The following symptoms may occur: anxiety, increased sweating, insomnia, chills, pain, nausea, tremors, diarrhea, symptoms from the upper respiratory tract, piloerection and, rarely, hallucinations. In order to prevent the syndrome of "withdrawal", it is recommended that the dose of the drug be gradually reduced before complete cancellation.
Inhibition of the central nervous system
The simultaneous use of tapentadol with other analgesics-agonists of mu-opioid receptors, narcosis drugs, phenothiazine derivatives, tranquilizers, sedatives, hypnotics and other drugs depressing the central nervous system (CNS), including alcohol and drugs, can increase CNS depression. Drug interactions leading to Deep sedation and coma may develop if these preparations with tapentadol. If such a combination is necessary, the question of reducing the dose of one of the drugs should be resolved.
Reduction of blood pressure
The drug Palexia can cause a significant reduction in blood pressure especially in patients with hypovolemia or taking concomitantly with tapentadol drugs that reduce the tone of peripheral vessels (eg, phenothiazine derivatives, anesthesia products).
Serotonin syndrome
There are reports of the development of a life-threatening serotonin syndrome with the simultaneous use of tapentadol even in therapeutic doses with serotonergic drugs: selective serotonin reuptake inhibitors (SSRIs), serotonin and noradrenaline reuptake inhibitors, tricyclic antidepressants, tryptanes, drugs that affect serotonergic transmission in the central nervous system (for example, mirtazapine, trazodone and tramadol), and drugs that interfere with the metabolism of serotonin (eg, MAO inhibitors). Possible symptoms of serotonin syndrome may be, for example: confusion, agitation, coma, tachycardia, fever, disruption of movement coordination, nausea, vomiting and diarrhea.
Tapentadol should be used with caution in patients with adrenocortical insufficiency (eg, in Addison's disease), in the case of nazis with alcoholic delirium, toxic psychosis, with myxedema and hypothyroidism, as well as prostatic hypertrophy and urethral strictures.