Guano, Histoplasmosis, and Our Service. Large accumulations of guano sometimes breeds a fungus called Histoplasmosis (see article, Is Bat Guano Dangerous?). This fungus can infect an eye or a lung, and in a serious case, you can lose your eye or lung to this infection.
Cromolyn sodium and nedocromil are prescribed as aerosols in metered dose inhalers (MDIs). Generally, you'll need to take either drug four times a day, but nedocromil has also been effective in a twice-per-day dose.
Cromolyn is also used just before exposure to conditions or substances (for example, exercise, allergens, such as pollen, aspirin, chemicals, cold air, or air pollutants) that cause bronchospasm (wheezing or difficulty in breathing). Cromolyn will not help an asthma or bronchospasm attack that has already started.