Phosphorus 200C liquid is a very good homeopathic remedy used for various issues such as anxiety and respiratory disorders such as asthma and bronchitis. Helps in better digestion of the food as it treats food intolerance. Other diseases such as pneumonia, hepatitis and bipolar disorders can also be treated. Heavy cough, asthma and chest congestion can also be treated by using this medicine. The dosage of single homeopathic remedy differ from drug to drug depending upon the age, condition, sensitivity and other things. Take ten drops of dilution in half a cup of water three times a day or as directed by the physician.