- Hypersensitivity to acetylsalicylic acid and other non-steroidal anti-inflammatory drugs (NSAIDs) and xanthines;
- erosive and ulcerative lesions of the gastrointestinal tract (in the phase of exacerbation);
- marked violations of the liver or kidney;
- "aspirin asthma";
- hemorrhagic diathesis (von Willebrand's disease, hemophilia, telangiectasia, hypoprothrombinemia, thrombocytopenia, thrombocytopenic purpura);
- exfoliating aortic aneurysm;
- deficiency of glucose-6-phosphate dehydrogenase;
- portal hypertension, vitamin K deficiency;
- anxiety disorders (agoraphobia, panic disorder);
- organic diseases of the cardiovascular system (acute myocardial infarction, arterial hypertension, paroxysmal tachycardia, frequent ventricular extrasystole);
- glaucoma;
- surgical interventions accompanied by bleeding.
The drug is not prescribed as an anesthetic for people under 18 years old, as an antipyretic agent - children under 15 years with acute respiratory diseases caused by viral infections because of the danger of developing Reye syndrome (encephalopathy and acute fatty liver with acute development of liver failure.