Cinnamon and longan are two different kinds of Chinese medicine.
Cinnamon is the dried bark of Cinnamomum cassiae, family Camphoraceae, and is a warm Chinese medicine. It has the effects of tonifying fire and assisting yang, dispersing cold and relieving pain, warming the meridians and channeling fire back to the original source, and can be used to treat cold pain in the waist and knees, impotence and uterine coldness, fear of cold limbs and cold extremities, deficiency of yang upward (relative deficiency of yang qi affecting the head and face), dizziness and redness of the face, and gastric coldness and vomiting.
Longan is the aril of Longan, a plant of the Sapindaceae family, and is a blood tonic. It has the effects of nourishing blood and tranquilizing the mind, tonifying the heart and spleen, and can be used to treat palpitation and dizziness (violent heartbeat and panic), forgetfulness and insomnia caused by deficiency of the heart and spleen, as well as general weakness, mental fatigue, and loss of appetite caused by weakness of qi and blood, and so on.
The use of Chinese medicines should be guided by a professional physician and should not be used on one’s own to avoid adverse consequences.