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Tiotropium bromide, sold under the brand name Spiriva among others, is a long-acting bronchodilator (LAMA: long acting muscarinic antagonist) used in the management of chronic obstructive pulmonary disease (COPD) and asthma.[10][11] Specifically it is used during periods of breathing difficulty to prevent them from getting worse, rather than to prevent them from happening.[10] It is used by inhalation through the mouth.[10] Onset typically begins within half an hour and lasts for 24 hours.[10]
Common side effects include a dry mouth, runny nose, upper respiratory tract infection, shortness of breath and headache.[10] Severe side effects may include angioedema, worsening bronchospasm, and QT prolongation.[10] Tentative evidence has not found harm during pregnancy, however, such use has not been well studied.[1] It is an anticholinergic medication and works by blocking acetylcholine action on smooth muscle.[10]
Tiotropium is used as maintenance treatment of chronic obstructive pulmonary disease (COPD).[16][17] It may also be used as an add-on therapy in people with moderate-to-severe asthma on medium to high dose inhaled corticosteroids (ICS).[18][19] It is not however approved for acute exacerbations of COPD or acute worsening of asthma.[10]
Tiotropium is also used in a combination inhaler with olodaterol, a long-acting beta-agonist, for the treatment of COPD, under the brand names Stiolto and Spiolto among others.[20][21][22]
Data regarding some serious side effects is mixed as of 2020.[10] In September 2008 a review found that tiotropium and another member of its class ipratropium may be linked to increased risk of heart attacks, stroke and cardiovascular death.[25] The US FDA reviewed the concern and concluded in 2010 that this association was not supported.[16][26] A 2011 review of the tiotropium mist inhaler (Respimat), however, still found it associated with an increase in all cause mortality in people with COPD.[27][28]
Mechanism of action
Tiotropium is a muscarinic receptorantagonist, often referred to as an antimuscarinic or anticholinergic agent. Although it does not display selectivity for specific muscarinic receptors, when topically applied it acts mainly on M3 muscarinic receptors[29] located on smooth muscle cells and submucosal glands. This leads to a reduction in smooth muscle contraction and mucus secretion and thus produces a bronchodilatory effect.[citation needed]
Society and culture
Tiotroprium is available in two inhaler formats: a soft mist inhaler (Respimat) and a dry powder inhaler (HandiHaler).[30] The safety and efficacy profiles of both devices are comparable and people's preference should play a role in determining inhaler choice.[30] There is no significant difference in all-cause mortality between tiotropium soft mist inhalers compared to dry powder inhalers, however caution needs to be taken in people with severe heart or kidney problems.[31]
^ ab"AusPAR: Tiotropium bromide". Therapeutic Goods Administration (TGA). 29 November 2016. Archived from the original on 1 October 2021. Retrieved 30 September 2021.
^World Health Organization (2023). The selection and use of essential medicines 2023: web annex A: World Health Organization model list of essential medicines: 23rd list (2023). Geneva: World Health Organization. hdl:10665/371090. WHO/MHP/HPS/EML/2023.02.
^ abTashkin DP, Celli B, Senn S, Burkhart D, Kesten S, Menjoge S, Decramer M (October 2008). "A 4-year trial of tiotropium in chronic obstructive pulmonary disease". The New England Journal of Medicine. 359 (15): 1543–1554. doi:10.1056/nejmoa0805800. hdl:2437/111564. PMID18836213.
^Rodrigo GJ, Castro-Rodríguez JA (February 2015). "What is the role of tiotropium in asthma?: a systematic review with meta-analysis". Chest. 147 (2): 388–396. doi:10.1378/chest.14-1698. PMID25322075.
^Kesten S, Jara M, Wentworth C, Lanes S (December 2006). "Pooled clinical trial analysis of tiotropium safety". Chest. 130 (6): 1695–1703. doi:10.1378/chest.130.6.1695. PMID17166984.
^Singh S, Loke YK, Furberg CD (September 2008). "Inhaled anticholinergics and risk of major adverse cardiovascular events in patients with chronic obstructive pulmonary disease: a systematic review and meta-analysis". JAMA. 300 (12): 1439–1450. doi:10.1001/jama.300.12.1439. PMID18812535.