Yogurt helps maintain the ecological balance of intestinal flora and is widely loved by everyone. However, yogurt and some medications are "foes". If taken together, they may reduce drug efficacy, cause adverse reactions, or damage the components of the 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 partial efficacy 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 drugs 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 in the duodenum, leading to reduced absorption of the iron supplement and lower efficacy.
Antidiabetic Drugs: The fermentation process of yogurt produces significant lactic acid. Meanwhile, biguanide antidiabetic drugs like metformin and phenformin increase lactic acid levels in the body while exerting their therapeutic effects. Drinking 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 tract more acidic, potentially damaging the coating of enteric-coated or film-coated 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. Yogurt should be consumed with caution when taking biguanide antidiabetic drugs, and it is advisable to consult a doctor if necessary.