Diarrhea caused by a cold can be treated with amoxicillin and patchouli. When you have a cold, the body exhibits an upper respiratory tract infection. Untreated colds can cause invasion of the intestinal system and induce gastrointestinal type colds. Amoxicillin is effective in treating various diseases caused by bacterial infections, relieving colds and treating gastrointestinal colds. Huo Xiang Zheng Qi Shui has a therapeutic effect on colds and gastroenteritis symptoms caused by external wind and cold, summer heat and humidity.