In case of overdose, immediately consult a doctor.
Rapid medical care is critical, even if you do not observe any signs or symptoms.
Pheniramine
Symptoms: convulsions, impaired consciousness, coma.
Paracetamol
Symptoms (due mainly to paracetamol), in adults and children older than 12 years, manifest after taking more than 7.5 - 10 g for 8 hours. Deaths are rare (less than in the 3- 4% untreated cases) and are observed with a dose of ≥ 15 g of paracetamol. In children younger than 12 years, acute overdose when taking ≤150 mg / kg of paracetamol is not associated with hepatotoxicity.
During the first 24 hours after the reception - anorexia, nausea, vomiting, abdominal pain, increased sweating, pallor and general malaise.
Symptoms of liver dysfunction can appear in 12-48-72 hours after an overdose: increased activity of "liver" transaminases, hepatonecrosis. In severe cases - liver failure with progressive encephalopathy, coma. Rarely, liver failure develops at a lightning speed and can be complicated by renal insufficiency (tubular necrosis). In case of drug overdose paracetamol with delayed release, it is advisable to further determine the concentration of paracetamol in the plasma 4-6 hours after the initial concentration of paracetamol in the plasma is determined.Severe hepatotoxicity or deaths were extremely rare in acute paracetamol overdose in young children, possibly due to differences in the pathways of paracetamol metabolism.
Below are the clinical phenomena associated with an overdose of paracetamol, which, if considered in connection with an overdose, are considered expected, including a fatal outcome due to fulminant hepatic insufficiency or its consequences. The following clinical consequences of acute liver failure caused by an overdose of paracetamol (in adults and adolescents over 12 years of age receiving> 7.5 g of paracetamol for 8 hours, in children <12 years of age, intake> 150 mg / kg paracetamol for 8 hours) are expected: sepsis, fungal infection, bacterial infection, disseminated intravascular coagulation, coagulopathy, thrombocytopenia, hypoglycemia, metabolic acidosis, lactic acidosis, coma, encephalopathy, cerebral edema, cardiomyopathy, hypotension, respiratory failure, pancreatitis, bleeding from gastrointestinal tract, acute renal failure (tubular necrosis), multiple organ failure.
The overdose threshold can be reduced in children, in patients taking certain medicines (eg, inductors of microsomal liver enzymes), alcohol or suffering from malnutrition.
Treatment: gastric lavage, the appointment of activated charcoal in the first 6 hours after an overdose, the introduction of donators SH-groups and precursors of the synthesis of glutathione-methionine after 8-9 hours after an overdose and acetylcysteine through 12 h. The need for additional therapeutic measures (further introduction of methionine and acetylcysteine) is determined by the concentration of paracetamol in the blood, as well as the time passed after its administration. Symptomatic therapy.