They might make some people feel dizzy, and can cause or worsen tinnitus in others. H-1 receptor antihistamines have anticholinergic properties, which can have adverse neurological effects. However, these are also the most likely type of antihistamines to cause tinnitus. The second generation of subtypes have fewer central effects, so they are generally used in allergy medications.Īntihistamine drugs that bind to H-1 receptors are the ones that are most often used to treat allergies and allergic rhinitis (inflammation of the nasal passages). The first-generation subtypes of H-1 receptors have a central effect, and can be used as sedatives. Quite simply, they are called H-1 receptors and H-2 receptors. There are two main classes of histamine receptors. Other types of antihistamines can be prescribed to treat upper gastrointestinal conditions (like acid reflux) that are caused by excessive stomach acid.Several types of antihistamines that cause drowsiness can be used to help induce sleep and relieve insomnia.Diphenhydramine, can help decrease stiffness and tremors in people who have Parkinson’s disease.The syrup form of diphenhydramine can relieve coughs from the common cold or from hayfever.Antihistamines can prevent dizziness, motion sickness, nausea, and vomiting.Here are some of the most common reasons that doctors prescribe antihistamines: ![]() They can provide effective treatment for insomnia, motion sickness, and even Parkinson’s disease. What Conditions Can Antihistamines Treat?īesides allergies, antihistamines can be prescribed for many other conditions.
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