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Cinnarizine is an antihistamine and calcium channel blocker of the diphenylmethylpiperazine group. [5] It is prescribed for nausea and vomiting due to motion sickness [6] or other sources such as chemotherapy, [7] vertigo, [8] or Ménière's disease. [9] Cinnarizine is one of the leading causes of drug-induced parkinsonism. [5]
"Treatment of vertigo due to acute unilateral vestibular loss with a fixed combination of cinnarizine and dimenhydrinate: a double-blind, randomized, parallel-group clinical study". Clin Ther . 26 (6): 866– 77.
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]
An equianalgesic chart is a conversion chart that lists equivalent doses of analgesics (drugs used to relieve pain). Equianalgesic charts are used for calculation of an equivalent dose (a dose which would offer an equal amount of analgesia) between different analgesics. [1]
Flunarizine is a selective calcium antagonist with moderate other actions including antihistamine, serotonin receptor blocking and dopamine D 2 blocking activity. Compared to other calcium channel blockers such as dihydropyridine derivatives, verapamil and diltiazem, flunarizine has low affinity to voltage-dependent calcium channels.
As the article states, cinnarizine is a CNS depressant, that is, it has antihistaminic, antiserotonergic, antidopaminergic effects. How strong, you ask? Strong enough not to be approved. One example: the usual dosage is supposed to be 2-3 tablets a day. Here I will describe effects on a test subject at a dose of 2 tablets a day.
[52] [53] In rats, less than 2% of the drug is excreted unchanged. [ 53 ] The time to reach maximum concentration ( T max ) of hydroxyzine is about 2.0 hours in both adults and children and its elimination half-life is around 20.0 hours in adults (mean age 29.3 years) and 7.1 hours in children.
Dihydropyridine calcium channel blockers are derivatives of 1,4-dihydropyridine that are used as L-type calcium channel blockers. [1] They are used in the treatment of hypertension.