do second generation antihistamines cross the blood brain barrier
Antihistamine Second-generation antihistamines cross the blood–brain barrier to a much lower degree than the first-generation antihistamines. Their main benefit is they primarily affect peripheral histamine receptors and therefore are less sedating. However, high doses can still induce drowsiness through acting on the central nervous system. Some second-generation antihistamines, notably cetirizine, can interact with CNS psychoactive drugs such as bupropion and benzodiazepines.[10]
Eye injuries during general anaesthesia Methods to prevent intraoperative corneal injuries include
Cerebellar tentorium It covers the top of the cerebellum, and supports the occipital lobes of the brain.
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Vein Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.
Cerebrum With the assistance of the cerebellum, the cerebrum controls all voluntary actions in the body.