Hello, OxyElite Pro is a thermogenic fat burning supplement and a weight loss supplement. Chest pain may get triggered as blood circulation gets reduced by reducing the width of the blood vessels. It acts as a vasoconstrictor agent. Chest pain is triggered as the blood flow to the heart drops. It can induce heart attack, beware. Since you are getting chest pain, you are advised not to take it. Get clinically examined by a GP, get cardiac function tests and lipid profile tests along with other imaging tests for heart & lungs done to detect any underlying medical condition. Your treatment will depend on the pathology diagnosed & severity of the symptoms. To prevent asthma, avoid stress (both physical & emotional). Stay relaxed. Prefer to spend more time at locations that have a higher oxygen concentration than staying in small cities & near pollution. Maintain healthy weight. Use a room humidifier. Using decongestant is helpful. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician