___*TYPES*___
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*’anti-histamines’ are drugs which treat ‘allergic rhinitis’ + other ‘allergies’*
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(‘antihistamines’ can give relief when a person has ‘nasal congestion’, ‘sneezing’, or ‘hives’ because of ‘pollen’, ‘dust mites’, or ‘animal allergy’)
(typically people take anti-histamines as an inexpensive, generic, over-the-counter drug with few side effects)
(as an alternative to taking an antihistamine, people who suffer from allergies can instead avoid the substance which irritates them)
(however, this is not always possible as some substances, such as pollen, are carried in the air, thus making allergic reactions caused by them generally unavoidable)
(‘anti-histamines’ are usually for short-term treatment)
(‘chronic allergies’ increase the risk of health problems which antihistamines might not treat, including asthma, sinusitis, and ‘lower respiratory tract infection’)
(doctors recommend that people talk to them before any longer term use of ‘anti-histamines’)
(although people typically use the word “antihistamine” to describe drugs for treating allergies, doctors and scientists use the term to describe a class of drug that opposes the activity of ‘histamine receptors’ in the body)
(in this sense of the word, ‘anti-histamines’ are subclassified according to the ‘histamine receptor’ that they act upon)
(the 2 largest classes of ‘anti-histamines’ are ‘H1-antihistamines’ + ‘H2-antihistamines’)
(‘anti-histamines’ that target the ‘histamine H1-receptor’ are used to treat ‘allergic reactions’ in the ‘nose’ (e.g. ‘itching’ / ‘runny nose’ / ‘sneezing’) as well as for ‘insomnia’)
(they are sometimes also used to treat motion sickness or vertigo caused by problems with the ‘inner ear’)
(‘anti-histamines’ that target the histamine H2-receptor are used to treat ‘gastric acid conditions’ (e.g., ‘peptic ulcers’ + ‘acid reflux’))
(funnily enough, the anti-histamines that target ‘H1 receptor’ (like ‘diphenhydramine’) CAUSES ‘acid reflux’)
(at least i think it does)
(does it slow down your stomach?)
(H1-antihistamines work by binding to histamine H1 receptors in mast cells, smooth muscle, and endothelium in the body as well as in the tuberomammillary nucleus in the brain)
(H2-antihistamines bind to histamine H2 receptors in the upper gastrointestinal tract, primarily in the stomach)
(‘histamine receptors’ exhibit ‘constitutive activity’, so ‘anti-histamines’ can function as either a ‘neutral receptor antagonist’ or an ‘inverse agonist’ at ‘histamine receptors’)
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(only a few currently marketed ‘H1-antihistamines’ are known to function as ‘inverse agonists’)
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥