Before taking T Phyl for breathing difficulties, a potential patient will need to discuss the decision with their local physician. Since smoking cigarettes will change how the body reacts to the medication, a patient should neither start nor stop smoking without consulting the physician. In addition, a patient will need to abstain from consuming products that contain caffeine because the likelihood of side effects may increase. As part of the consultation, a patient should be sure to mention any medications, vitamins, or supplements that are being taken to avoid complications. Also, the following conditions will need to be talked about: stomach ulcers, epilepsy, congestive heart failure, thyroid issues, liver disease, abnormal heartbeats, fluid in the lungs, kidney disease, or chronic fevers.