It is normal to experience fatigue and drowsiness when you have a cold. During a cold, due to viral infection or secondary bacterial infection, the body’s metabolic rate increases and consumes more energy in order to fight against foreign viruses or bacteria, making it easy to become fatigued and drowsy. When you have a cold, it is easy to cause congestion and edema in the nasal cavity, resulting in nasal congestion and runny nose, which leads to ventilation problems and mild hypoxia. For this condition, it is more normal to be prone to drowsiness. To effectively relieve the symptoms of cold and flu, you can use cold and flu medicines such as Aminogalactone capsules or Vitamin C silver fork tablets for adults. If it is a child, you can use pediatric aminophenol pseudo-lax dispersion tablets, pediatric blackberry clear fever granules, pediatric cold and flu clear fever granules or An’erning granules for treatment, the effect of relieving the cold is relatively good. If the drowsiness is obvious it is best to go to the hospital.