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Conditions Back ConditionsDrugs & Supplements Back Drugs & SupplementsWell-Being Back Well-BeingMore Back More Privacy & More Subscribe Log In Search Subscribe GuideOverviewCauses & PreventionSymptoms & TypesTests & DiagnosisTreatmentLiving With Support & Resources View Full Guide Bronchodilators (Rescue Inhalers): Short-Acting and Long-Acting TypesMedically Reviewed by Carol DerSarkissian, MD on February 20, 2024Written by 4 min readWhat Are Bronchodilators?Bronchodilators are medications that relax muscle bands that tighten around your airways. This opens the airway and lets more air move in and out of your lungs. That helps you breathe more easily. Bronchodilators also help remove mucus from your lungs. Open airways mean mucus can move more freely, too, and you can cough it up.Almost all people with asthma use a bronchodilator to help open their airways.Short-acting bronchodilators are used as a "quick relief" or "rescue inhalers", while long-acting bronchodilators can be used every day to control asthma -- along with an inhaled steroid.What Are the Types of Bronchodilators for Asthma?For symptoms, there are three types of bronchodilators: beta-agonists, anticholinergics, and theophylline. You can get these bronchodilators as tablets, liquids, and shots, but the preferred way to take beta-agonists and anticholinergics is inhaling them.What Are Short-Acting Bronchodilators?Short-acting bronchodilators are called quick-acting, reliever, or rescue medications. You might hear them called rescue inhalers. These bronchodilators relieve acute or attacks very quickly by opening your airways. The rescue inhalers are best for treating sudden asthma symptoms. The action of inhaled bronchodilators starts within minutes after you inhale them and lasts for 2 to 4 hours. Short-acting bronchodilators are also used before exercise to prevent exercise-induced asthma. Short-acting bronchodilators can also be used in an asthma nebulizer in the form of a liquid to treat an asthma attack at home.Overuse of short-acting bronchodilators, whether it’s a rescue inhaler, in tablets, or in liquid, is a sign of uncontrolled asthma that needs better treatment. If you need to use your short-acting bronchodilators more than twice a week, talk with your doctor about improving your asthma control therapy.Short-acting bronchodilator inhalers available in the United States include: (, , , , also available as a generic solution for nebulizers)Metaproterenol, available as a generic solution for nebulizers () ()What Are Long-Acting Bronchodilators for Asthma?Long-acting bronchodilators are used to provide control -- not quick relief -- of asthma. They should only be used with for long-term control of asthma symptoms. You’ll take most long-acting bronchodilators twice a day.Long-Acting Asthma Inhalers Available in the United States Include:, , and (a combination of a long-acting beta-agonist bronchodilator and an inhaled steroid)Formoterol ()Formoterol solution for nebulizers () () (which combines a long-acting beta agonist, another type of bronchodilator called an anticholinergic, and an inhaled steroid). It can be used either for asthma or COPD (chronic obstructive pulmonary disease).Long-acting beta-agonist raise the risk of death from asthma and should only be used as additional treatment for people who are using an inhaled steroid. For details, talk to your doctor and see the drugs’ black-box warning.Are There Common Side Effects of Bronchodilators Used for Asthma?Bronchodilators can have side effects such as:Nervous or shaky feelingHigher heart rate or palpitationsUpset stomachTrouble sleepingMuscle aches or crampsHow Do Anticholinergic Bronchodilators Work?Anticholinergics are bronchodilators mainly used for treating (such as emphysema) and asthma. treats COPD and can be used off-label to treat asthma flares. You can get it as an inhaler and a nebulizer solution. Dry throat is the most common side effect. If the medication gets in your eyes, it can cause blurred vision for a short time. () is a new medication used daily to help those with COPD breathe easier. Long-acting, it is taken once a day with a nebulizer. () is for people who have either asthma or COPD. It comes in an inhaler. Anyone over 6 can may use this medication once daily as a long-term asthma treatment. It’s used for COPD flares and long-term treatment if inhaled bronchodilators don’t help.What Is Theophylline? is a relatively weak but inexpensive bronchodilator that has a chemical similar to . It relaxes the smooth muscle that surrounds your airways.Theophylline is sold as a generic pill or under the brand names and . It’s available as an oral (pill and liquid) or intravenous (through the vein) drug. You can also get it in short- and long-acting forms to prevent asthma symptoms, especially nighttime symptoms. It’s not often used for asthma, though, because your doctor has to check your blood levels while you’re on it to make sure you aren’t getting too much.What Are the Side Effects of Theophylline?Side effects of theophylline include:Nausea and vomitingDiarrheaStomachacheHeadacheRapid or Muscle crampsJittery or nervous feelingHyperactivityThese side effects may also be a sign that you’ve taken too much medication. Your doctor will check levels of the drug in your blood to make sure you’re getting the proper amount.Always tell your doctors if you take theophylline for asthma because certain medications, like some antibiotics, seizure medicines, and ulcer medicines, can interact with it. Make sure your doctor knows about any other medical conditions you may have. Some diseases and illnesses can change how your body responds to theophylline.And keep in mind that not only is smoking and exposure to cigarette smoke especially dangerous when you have asthma, it can also interfere with how your body responds to the medication. So it’s best to avoid smoke and cigarette .SourcesUpdate HistorySharePrintSOURCES:American Academy of Asthma, Allergy & Immunology: "Asthma" and "Allergy and Asthma Drug Guide."National Jewish Medical and Research Center: "Inhaled Medication with a Metered Dose Inhaler (MDI)."Asthma Society of Canada: "How to Use Your Inhaler."Science Daily: "New Asthma Inhaler Propellant Effective, but Costlier."Children's Hospital Boston: "Allergy Treatment."Boehringer Ingelheim: "US FDA Expands Approval of Tiotropium Respimat® for Maintenance Treatment of Asthma in Children."FDA Prescribing Information: Spiriva Respimat.Cleveland Clinic: “Bronchodilators & Asthma.”American Lung Association: “Assess and Monitor Your Asthma Control.”Medscape: “ipratropium (Rx).”Medline Plus: "Fluticasone, Umeclidinium, and Vilanterol Oral Inhalation."SharePrintNext In TreatmentShow more articles More on Asthma Recommended FEATURED Top doctors in , Find more top doctors on Search Related LinksPoliciesAboutFor Advertisers © 2005 - 2025 WebMD LLC, an company. All rights reserved. WebMD does not provide medical advice, diagnosis or treatment. , A rescue inhaler is only intended for use during an asthma attack to relieve acute symptoms, not for long-term management. If someone needs to use their rescue inhaler more than twice a week, they , Rescue inhalers typically require two inhalations by mouth every 4 to 6 hours. You should wait 60 seconds between each inhalation for better absorption. Some people may only need one inhalation for either inhaler. Your healthcare provider will help you determine your daily maximum number of doses. Using rescue inhalers like albuterol or .
The rescue inhalers are best for treating sudden asthma symptoms. The action of inhaled bronchodilators starts within minutes after you inhale them and lasts for 2 to 4 hours., A rescue inhaler is a type of inhaled medication to help relieve the symptoms of or stop an asthma attack. Asthma is a chronic disease affecting your lungs. It causes narrowing or inflammation of , Rescue medicines work fast to improve symptoms during an asthma attack. Learn more about the types of asthma rescue medications used for quick relief. If you take daily ICS-formoterol for long-term control, then you can use the same inhaler for quick relief. This is called “single maintenance and reliever therapy” (SMART)., Yes -- assuming your rescue inhaler is a metered dose inhaler, which most of them are, the answer is yes. The spacer helps break down larger particles so they do not impact in your mouth, thereby reducing side effects. It also helps direct medicine directly to your lower airways where you want it. So, a spacer both improves distribution to your , Bronchodilators in rescue inhalers include short-acting beta-agonists (SABAs) and short-acting muscarinic antagonists (SAMAs or anticholinergics). They both work by relaxing the muscles in your airways. They last for four to six hours and come in a metered-dose inhaler or a nebulizer. Examples of short-acting bronchodilators include:, A rescue inhaler (bronchodilator) is a portable device that delivers medication to quickly relieve symptoms of asthma. Learn how this portable device quickly delivers asthma medication when you .