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Diphenhydramine is a potent anticholinergic agent and potential deliriant in higher doses. This activity is responsible for the side effects of dry mouth and throat, increased heart rate, pupil dilation, urinary retention, constipation, and, at high doses, hallucinations or delirium.
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 ...
Long-term use may increase the risk of both cognitive and physical decline. [14] [15] It is unclear whether they affect the risk of death generally. [14] However, in older adults they do appear to increase the risk of death. [16] Possible effects of anticholinergics include:
Taking minoxidil with the following medications may lower blood pressure and cause changes in your heart rate: Diphenhydramine (Benadryl) ... Medications like diuretics and antidepressants can ...
It should be 100% diphenhydramine, not Benadryl-D or any other product. Although Benadryl is safe, giving your dog decongestants like pseudoephedrine can cause: Depression. Weakness. Vomiting ...
So, your heart health has more to do with the conditioning of the heart muscle than the actual heart rate itself, Dr. Weinberg explains. How long does it take to lower your resting heart rate?
Organs that receive innervations from these systems include exocrine glands, heart, eyes, gastrointestinal tract etc. Antimuscarinic and antinicotinic agents can increase heart rate, inhibit secretions, and gastrointestinal motility. [1] [2] Naturally occurring antimuscarinics were found in alkaloids from Belladonna (Solanaceae) plants. They ...
Atropine acts on the M2 receptors of the heart and antagonizes the activity of acetylcholine. It causes tachycardia by blocking vagal effects on the sinoatrial node. Acetylcholine hyperpolarizes the sinoatrial node; this is overcome by MRAs, and thus they increase the heart rate.