Generally speaking, you can drink soy milk after taking metronidazole, and it usually does not adversely affect the drug effect of metronidazole. Soymilk is a kind of food rich in vegetable protein, and also contains trace elements needed by the human body, such as calcium, iron, phosphorus and so on. Soymilk is easier for the body to digest and absorb than other soy products. However, it should be noted that soy milk is a soybean product, if consumed too much may be bloating and other discomfort, so it is recommended not to eat a lot. Metronidazole is a kind of anti-inflammatory drugs, generally speaking, after taking the metronidazole, need to pay attention to is to avoid drinking strong tea, drinking alcohol or drinks containing alcohol, but the soybean milk is allowed to drink. The use of drugs need to follow the doctor’s instructions.