Yogurt helps maintain the ecological balance of intestinal flora and is widely popular. However, yogurt and some medications are "antagonists." If taken together, they may reduce the drug's effectiveness, cause adverse reactions, or damage the components of the yogurt.
Homemade Yogurt
Stomach Medications
Yogurt can promote gastric acid secretion, while stomach medications such as omeprazole and ranitidine work by inhibiting it. Drinking yogurt may counteract the effectiveness of these drugs.
Antibiotics
Antibiotics like roxithromycin, doxycycline, and chloramphenicol can affect the activity of lactic acid bacteria in yogurt. The calcium and magnesium ions in yogurt can form chelates with drugs like ofloxacin and ciprofloxacin, reducing their effectiveness. Additionally, yogurt can accelerate the hydrolysis of drugs that are unstable in acidic environments (such as erythromycin and amoxicillin), diminishing their therapeutic effect.
Iron Supplements
Iron-containing medications used to treat anemia (such as ferric ammonium citrate, ferrous succinate, and iron polysaccharide complex) should not be taken with yogurt. This is because the calcium ions in yogurt can compete with iron ions for absorption in the duodenum, leading to reduced absorption of the iron supplement and decreased efficacy.
Anti-diabetic Drugs
The fermentation process of yogurt produces significant amounts of lactic acid. Biguanide anti-diabetic drugs like metformin and phenformin increase lactic acid levels in the body as they work. Therefore, consuming yogurt while taking these medications may increase the risk of lactic acidosis.
If you consume a large amount of yogurt, it can make the gastrointestinal environment more acidic, potentially damaging the coating of enteric-coated or sustained-release tablets and affecting their efficacy. Therefore, it is recommended to separate the time of taking these medications and drinking yogurt by at least 2 hours. Caution is advised when consuming yogurt while taking biguanide anti-diabetic drugs; consult a doctor if necessary.