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Topical atropine is used as a cycloplegic, to temporarily paralyze the accommodation reflex, and as a mydriatic, to dilate the pupils. [15] Atropine degrades slowly, typically wearing off in 7 to 14 days, so it is generally used as a therapeutic mydriatic, whereas tropicamide (a shorter-acting cholinergic antagonist) or phenylephrine (an α-adrenergic agonist) is preferred as an aid to ...
[2] [3] It is a fixed-dose combination of the medications diphenoxylate, as the hydrochloride, an antidiarrheal; and atropine, as the sulfate, an anticholinergic. [1] It is taken by mouth. [2] Onset is typically within an hour. [4] Side effects may include abdominal pain, angioedema, glaucoma, heart problems, feeling tired, dry mouth, and ...
In 1900, Reid Hunt, a pharmacologist (1870-1948), realised a fall in blood pressure in rabbits after removing adrenaline (epinephrine) from adrenal glands extract. While he initially attributed this effect to choline, he later discovered acetylcholine was 100 000 times more potent in lowering blood pressure.
In the United States, belladonna is marketed as a dietary supplement, typically as an atropine ingredient in over-the-counter cold medicine products. [40] [56] Although such cold medicine products are probably safe for oral use at typical atropine dosages (0.2 milligram), there is inadequate scientific evidence to assure their effectiveness. [56]
Organophosphate based nerve agent poisoning, such as VX, sarin, tabun, and soman (atropine is favoured in conjunction with an oxime, usually pralidoxime) [6] [7] Anticholinergics generally have antisialagogue effects (decreasing saliva production), and most produce some level of sedation, both being advantageous in surgical procedures. [8] [9]
Diphenoxylate is used to treat diarrhea in adults; it is only available as a combination drug with a subtherapeutic dose of atropine to prevent abuse. [2] It should not be used in children due to the risk of respiratory depression. [2] It does not appear harmful to a fetus but the risks have not been fully explored. [2]
Ipratropium is a derivative of atropine [3] but is a quaternary amine and therefore does not cross the blood–brain barrier, which prevents central side effects. Ipratropium should never be used in place of salbutamol (albuterol) as a rescue medication.
An antiemetic is a drug that is effective against vomiting and nausea. Antiemetics are typically used to treat motion sickness and the side effects of opioid analgesics, general anaesthetics, and chemotherapy directed against cancer. They may be used for severe cases of gastroenteritis, especially if the patient is dehydrated. [1] [2]