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Betahistine was once believed to have some positive effects in the treatment of Ménière's disease and vertigo, [3] but more recent evidence casts doubt on its efficacy. [4] [5] Studies of the use of betahistine have shown a reduction in symptoms of vertigo and, to a lesser extent, tinnitus, but conclusive evidence is lacking at present.
A histamine agonist is a drug which causes increased activity at one or more of the four histamine receptor subtypes.. H 1 agonists promote wakefulness. [1]H 2: Betazole and Impromidine are examples of agonists used in diagnostics to increase histamine.
An H 3 receptor antagonist is a type of antihistaminic drug used to block the action of histamine at H 3 receptors.. Unlike the H 1 and H 2 receptors which have primarily peripheral actions, but cause sedation if they are blocked in the brain, H 3 receptors are primarily found in the brain and are inhibitory autoreceptors located on histaminergic nerve terminals, which modulate the release of ...
Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides relief from nasal congestion, sneezing, or hives caused by pollen, dust mites, or animal allergy with few side effects. [1]
The most common adverse effect is sedation; this "side-effect" is utilized in many OTC sleeping-aid preparations. 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 ...
Meclizine, sold under the brand name Bonine, among others, is an antihistamine used to treat motion sickness and dizziness . [3] It is taken by mouth. [3] Effects generally begin in an hour and last for up to a day. [3] Common side effects include sleepiness and dry mouth. [3] Serious side effects may include allergic reactions. [3]
Cinnarizine is predominantly used to treat nausea and vomiting associated with motion sickness, [6] vertigo, [8] Ménière's disease, [9] or Cogan's syndrome. [3] It is one of only a few drugs that has a beneficial effect in the chronic treatment of the vertigo and tinnitus associated with Ménière's disease.
One of the ways the chemoreceptor trigger zone implements its effects on the vomiting center is by activation of the opioid mu receptors and delta receptors. [6] The activation of these opioid receptors in the CTZ are especially important for patients who take opioid based pain medications on a regular basis.