The drug is not prescribed as antipyretic - children up to 15 years with acute respiratory diseases caused by viral infections, due to the risk of Reye syndrome (encephalopathy and acute fatty liver with the development of acute liver failure).
With continued use of the drug, control of peripheral blood and the functional state of the liver is necessary. Because the acetylsalicylic acid has an antiaggregatory effect, the patient, if he is to undergo surgery, should warn the doctor in advance about taking the drug. Acetylsalicylic acid in low doses reduces the excretion of uric acid. This can in some cases provoke a gout attack.
During treatment, you should stop using alcohol-containing beverages (increased risk of gastrointestinal bleeding).
Acetylsalicylic acid has a teratogenic effect: when applied in the first trimester of pregnancy leads to malformations - the cleavage of the upper palate; in the third trimester - inhibition of labor (inhibition of the synthesis of prostaglandins), the closure of the arterial duct in the fetus, which causes hyperplasia of the pulmonary vessels and hypertension in the vessels of the small circulation. Acetylsalicylic acid is excreted in breast milk, which increases the risk of bleeding in the child due to impaired platelet function.
In connection with the stimulating effect of ascorbic acid on the synthesis of corticosteroid hormones, it is necessary to monitor the kidney function and arterial pressure.
Assigning ascorbic acid to patients with rapidly proliferating and intensely metastatic tumors can aggravate the course of the process. Ascorbic acid, as a reductant, can distort the results of various laboratory tests (blood glucose, bilirubin, activity of "liver" transaminases, LDH).
In patients suffering from bronchial asthma and pollinosis, the development of hypersensitivity reactions is possible.
During the period of drug use, one should refrain from active activities associated with the need for concentration of attention and increased speed of psychomotor reactions.