What is the function of homeopathy phosphorus 30?

Phosphorus 30 is a low dose homeopathic remedy. Phosphorus in general is used when there are signs of cough. The person, though sick may still feel perky and may be thirsty for cold drinks and hungry especially at night. There are many other conditions that respond to phos as homeopathic remedys cover a broad spetrum of symptoms and are perscribed case by case.