Drugs and substances can have complex effects on biochemical tests, not only by altering the metabolic processes of certain substances in the body, but also by interfering with chemical reactions during experiments, causing bias in test results. The following is a list of the effects of common drugs and drugs on test results: Vitamin C lower: blood glucose, uric acid, triglycerides, total cholesterol caffeine contraceptives and estrogenic drugs higher: transferrin, triglycerides caffeine higher: blood glucose, fatty acids, angiotensin, catecholamines tobacco ingredients higher: carbon monoxide bound hemoglobin, fatty acids, adrenaline, glycerol, aldosterone, adrenaline Corticosteroids Alcohol Elevated: lactate, uric acid, acetic acid, aldosterone, epinephrine, norepinephrine Decreased: glucose, LDL-cholesterol Morphine Elevated: amylase, lipase, AST, ALT, bilirubin, alkaline phosphatase, gastrin, TSH, prolactin Decreased: insulin, norepinephrine, neurotensin, pancreatic polypeptide Therefore, when evaluating test results, physicians should know Whether the patient has a history of medication and drug use. In turn, the patient should be truthful so that a comprehensive analysis can be made and accurate judgments can be made.