Introduction Proventa 100 belongs to a group of medicines called fast-acting bronchodilators or ?relievers?. It?s used to treat the symptoms of asthma and chronic obstructive pulmonary disease (COPD) such as coughing, wheezing and feeling short of breath. You can take Proventa 100 with or without food. The dose will depend on your condition and how your respond to the medicine. Try to take it at the same time each day. It?s important to keep taking this medicine until your doctor tells you not to. Use this medicine regularly to get the most benefit from it even if you feel well. Proventa 100 is generally safe and effective but some common side effects include tremor, headache. fast heart rate, and muscle cramps. These side effects aren't often dangerous and they should gradually improve as your body gets used to this medicine. There are other, rarer, side effects and you should call your doctor straight away if you get chest pain, a very bad headache or very bad dizziness. Before using Proventa 100l, you should tell your doctor if you have high blood pressure, an overactive thyroid gland, a history of heart problems, diabetes or low levels of potassium in your blood to make sure it?s safe. Also make sure your doctor knows if you?re pregnant or breast-feeding before taking this medicine. Because this medicine can make you feel dizzy or shaky, don?t drive, cycle or use tools or machinery until you feel better. And you shouldn?t smoke. Smoking causes damage to your lungs and will make your condition worse.