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Diphenhydramine is a potent antimuscarinic (a competitive antagonist of muscarinic acetylcholine receptors) and, as such, at high doses can cause anticholinergic syndrome. [68] The utility of diphenhydramine as an antiparkinson agent is the result of its blocking properties on the muscarinic acetylcholine receptors in the brain.
When suffering from Cyanopsia some individuals may also experience blurred vision, or heightened sensitivity to bright light, which can make well-lit environments uncomfortable. [3] The condition is typically temporary and does not cause pain or physical discomfort.
Other common adverse effects in first-generation H 1-antihistamines include dizziness, tinnitus, blurred vision, euphoria, incoordination, anxiety, increased appetite leading to weight gain, insomnia, tremor, nausea and vomiting, constipation, diarrhea, dry mouth, and dry cough.
Here's More Evidence That Common Drugs May Cause Cognition Issues. If you've ever popped a Benadryl or two to sleep through a long flight (or even just a regular night), you can pretty much count ...
Benadryl Dry, Tickly Cough Liquid is a cough medicine found in Australia. It is used to temporarily relieve irritating coughs. Pholcodine is the main ingredient found in this cough liquid. [11] This medication is to be taken orally and may cause drowsiness. In India, Benadryl can also be found in the form of a cough liquid and also cough lozenges.
Tolerance can cause users to use more opioid, ... blurred vision, mydriasis, depression, ... purposeful overmedication with Benadryl (diphenhydramine) was a concern ...
Astigmatism, a disorder that affects how the eyes focus light, can be exacerbated at night. Blurry vision and headaches are symptoms of astigmatism. Why astigmatism causes blurry vision ...
In rare cases, Viagra and other ED medications may cause issues such as blurred vision, loss of vision, hearing loss, nasal congestion and feelings of dizziness or lightheadedness, indigestion or ...