Lok Wo Cha is another classic formula used to detoxify pathogenic Wind-Heat from the body. Pathogenci Wind-Heat means symptoms of Heat that invaded the body externally, rather than sickness being caused from the inside. This remedy is great for early signs of heatstroke in the Summer exhbiting any symptoms of nausea, dizziness, muscle weakness or cramping, flushed face but inability to sweat, headache, rapid heartbeat, and confusion. True heatstroke is considered a medical emergency; someone exhibiting all of these symptoms should be taken to the hospital. To prepare boil one pack of herbs with a bowlful of water for 10-20 minutes. Strain the herbs and drink remaining liquid. Of course, read packaging for specific preparation and dosage recommendations.