After taking Cefdinir capsules, you should take at least 1 week before drinking alcohol. Because cefdinir capsules belong to the cephalosporin class, which is a kind of β-lactam drugs, all β-lactam drugs will react chemically with ethanol in alcohol, and such chemical reaction is called disulfiram-like reaction. Disulfiram-like reactions can cause allergic symptoms such as rash, itching, and red skin all over the body. In severe cases, the patient may experience chest tightness, shortness of breath, palpitations, precordial discomfort, itching and cardiac arrhythmia. In the most serious cases, dizziness, headache, nausea with jet vomiting, and even transient unconsciousness, fainting and other serious anaphylactic shock may occur. Therefore, you should wait for at least 1 week (7 days) after taking cefdinir capsules until the cephalosporin in your body has been metabolized before you can drink alcohol, and if you experience any discomfort during the drinking process, you must go to the hospital.