Once you've taken your medicine, that's it, a habit of yours. However, drugs participate in the entire digestive process and may interact with the cigarette you just smoked, the juice you drank, or the food you ate. Therefore, it is necessary for you to know what foods and drinks to avoid while taking your medication to prevent the reduction of its effectiveness and even the occurrence of adverse reactions.
Smoking – Any Medication You should not smoke within 30 minutes after taking any medication. This is because nicotine accelerates the liver's process of breaking down drugs, thereby reducing the drug's concentration in the blood. Dr. Wei Minji of the Institute of Clinical Pharmacology at Peking University says that in recent years, extensive research by medical professionals has proven that smoking not only harms health but also interferes with drug metabolism, reduces drug efficacy, and can even delay the treatment of a disease. Nicotine in cigarettes, after entering the human body, affects the metabolic enzyme system in the liver, causing the drug's metabolism to speed up or slow down. This leads to a decrease in the effective concentration of the drug in the blood, preventing it from working as it should. Nicotine can also release antidiuretic hormone, which prevents metabolic waste products from being excreted in a timely manner, leading to drug accumulation and poisoning. Furthermore, smoking excessively depletes the minerals and various essential nutrients needed to synthesize vitamin C, vitamin B6, and vitamin B12, indirectly adversely affecting the drug treatment process. It is best to quit smoking while taking medication. Of course, not all drugs are significantly affected by smoking. Medical research shows that drugs whose efficacy is markedly affected by smoking include antipyretic and analgesic drugs, anesthetics, anti-asthmatic drugs, anti-angina drugs, anti-platelet drugs, lipid-lowering drugs, hypoglycemic drugs, diuretics, antacids, gastric mucosal protective drugs, and oral contraceptives. Common examples include theophylline, caffeine, propranolol, antipyrine, imipramine, phenacetin, pentazocine, propoxyphene, and furosemide. Therefore, Dr. Wei advises that special care should be taken when taking the above medications. First, it is best to quit smoking during the course of treatment, especially for patients with diabetes, cardiovascular diseases, peptic ulcers, lung diseases, allergic diseases, and cancer, because smoking has the greatest impact on the incidence and treatment efficacy of these diseases. Second, be sure not to smoke within 30 minutes after taking medication. Experiments have confirmed that if a patient smokes within 30 minutes of taking medication, the blood drug concentration can drop to 1/20 of what it would be without smoking, preventing the drug from working properly. Alcohol, Juice – Aspirin Aspirin is a common antipyretic and analgesic drug, and one of its main side effects is damage to the gastric mucosa. If you drink alcohol after taking aspirin, this side effect is often "amplified." This is because, on one hand, drinking itself can cause damage to the gastric mucosa, and on the other hand, alcohol increases gastric acid secretion, exacerbating the damage aspirin causes to the gastric mucosa. In mild cases, this can cause capillary bleeding in the stomach and a positive fecal occult blood test. In severe cases, it can lead to massive gastric bleeding. Therefore, when taking aspirin, you must "draw a clear line" with alcohol, and patients with a history of gastric ulcers or gastric bleeding should be especially cautious. In addition to aspirin, alcohol is also an "enemy" of other antipyretic and analgesic drugs such as paracetamol, aminopyrine, and indomethacin. Alcohol not only reduces the efficacy of drugs like paracetamol but, more seriously, can cause severe liver and kidney damage, which in severe cases can even be life-threatening. Patients with hepatitis, cirrhosis, liver insufficiency, nephritis, or renal insufficiency should keep this in mind. Drinking juice after taking aspirin will intensify the irritation of aspirin to the gastric mucosa and can also induce gastric bleeding. Milk, Juice – Antibiotics Do not drink milk or juice within 2 hours before or after taking antibiotics. This is because milk can reduce the activity of antibiotics, preventing them from working to their full potential. The fruit acid in juice (especially fresh juice) accelerates the dissolution of antibiotics, not only reducing their efficacy but also potentially generating harmful byproducts and increasing toxic side effects. Spinach – Calcium Tablets Spinach contains a large amount of potassium oxalate. After entering the human body, the oxalate ions released will precipitate calcium ions, which not only hinders the body's absorption of calcium but also easily leads to the formation of calcium oxalate stones. Experts recommend not eating spinach within 2 hours before or after taking calcium tablets, or first blanching the spinach to dissolve the potassium oxalate into the water before discarding the water and eating it. Cheese, Meat Products – Antiallergic Drugs While taking antiallergic drugs, avoid foods rich in histamine, such as cheese and meat products. This is because histamine is converted into histamine in the body, and antiallergic drugs inhibit the breakdown of histamine, leading to an accumulation of histamine in the body and inducing symptoms such as dizziness, headache, and palpitations. Shrimp – Vitamin C You cannot eat shrimp within 2 hours before or after taking vitamin C. This is because the copper in shrimp oxidizes vitamin C, rendering it ineffective. At the same time, the pentavalent arsenic in shrimp can react with vitamin C to form toxic trivalent arsenic. Tea – Berberine Tea water contains about 10% tannins. Tannins break down into tannic acid in the body, which precipitates the alkaloids in berberine, greatly reducing its efficacy. Therefore, you cannot drink tea within 2 hours before or after taking berberine. Milk – Anti-diarrheal Drugs When taking anti-diarrheal medication, you cannot drink milk. This is because milk not only reduces the efficacy of the anti-diarrheal drug, but its lactose content can also worsen diarrhea symptoms. Sweets – Bitter Tonic Stomachic Drugs Bitter tonic stomachics rely on their bitter taste to stimulate the secretion of digestive fluids like saliva and gastric juice to increase appetite and aid digestion. Sweet ingredients, on one hand, mask the bitter taste and reduce efficacy, and on the other hand, can form complexes with many components in the stomachic, reducing the content of its active ingredients. Bananas, Oranges – Diuretics While taking diuretics, potassium can be retained in the blood. If you also eat potassium-rich bananas and oranges at the same time, the accumulation of potassium in the body becomes more severe, which can easily induce complications related to the heart and blood pressure. Coffee, Cola – Ibuprofen Ibuprofen (Fenbid) is highly irritating to the gastric mucosa. The caffeine in coffee and cocaine in cola both stimulate gastric acid secretion, so they can exacerbate the toxic side effects of ibuprofen on the gastric mucosa, even inducing gastric bleeding or perforation. Grapefruit Juice – Antihypertensive Drugs You cannot drink grapefruit juice while taking antihypertensive drugs. This is because the naringenin in grapefruit juice affects the function of a certain enzyme in the liver, and this enzyme is related to the metabolism of antihypertensive drugs, which will cause the drug concentration in the blood to become too high and greatly increase side effects. Hot Water – Polyenzyme Tablets Enzymes are the active ingredients in digestive aids like polyenzyme tablets. This active protein coagulates and denatures when exposed to hot water, losing its proper digestive function. Therefore, it is best to take polyenzyme tablets with cold water. Radish – Tonic Chinese Medicines Tonic Chinese medicines work by supplementing qi to nourish the qi, blood, yin, and yang of the entire body. Radish has the effect of "breaking qi" and will greatly diminish the tonic effect. Therefore, you should avoid eating radish while taking tonic Chinese medicines.