Boy with aerosol inhaler. Male child demonstrating the correct use of an inhaler device. The pressurised aerosol inhaler is as effective and convenient method of giving a bronchodilator for mild to moderate asthma. The drug is delivered to the lungs, where it widens the airways. The technique is to inhale slowly and hold the breath for 10 seconds before breathing out. A good seal must be made around the nozzle with the lips. The patient needs to be well co-ordinated and compliant. The device is not suitable for achildren under the age of eighteen months.