Diarrhea after taking Nourishing Blood and Clearing the Brain Granules is due to the adverse reaction of the drug. The adverse reactions of Nourishing Blood and Clearing the Brain Granules include diarrhea, abdominal pain, nausea and vomiting, dizziness, panic, skin rash, etc. Therefore, the occurrence of diarrhea after taking the drug indicates that the body is intolerant to the drug and thus an adverse reaction occurs. Patients should stop using the drug and seek medical advice promptly. Nourishing Blood and Clearing the Brain Granules has the efficacy of nourishing blood and calming the liver (calming the liver wind by replenishing the liver blood), activating the blood and opening up the channels, and is often used in the treatment of headache due to blood deficiency and liver exuberance, dizziness and blurred vision, irritability, insomnia and dreaminess. Pregnant women, patients with hepatic insufficiency and those who are allergic to this product should avoid using it. Do not eat greasy and spicy food during the medication. Before using Nourishing Blood and Clearing the Brain Granules, you need to consult a professional Chinese medicine practitioner and take it under the guidance of the doctor’s diagnosis, and you can’t use it blindly.