Hi, YOU have to set your nebulizer, attach the plug in socket. Now open the tube you are intending to inhale & pour in nebulizer bulb, screw it close. Wear the mask. Sit / sleep in comfortable position. Put the electricity onto start nebulizer, Fine particles of the drug would enter the mask, go on inhaling slowly to inhale the drug. The drug to be used is as per directions of treating doctor. Mostly Budate is advised once\ twice a day, depending on severity. This drug prevents allergy / recurrence of the attack. Levolin is for controlling broncho-spasm (breathlessness). This is to be taken twice a day & extra dose as per need. The antibiotic, cough syrup is added as per need, in addition to the nebulization. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Vasudha Jayant Athavale, General & Family Physician