| 21. | The attained high levels of cAMP persist during histamine release.
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| 22. | Antibiotics like polymyxin are also found to stimulate histamine release.
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| 23. | Histamine causes dilation and increased permeability of capillaries close to the basophil.
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| 24. | Harmaline is known to act as a histamine N-methyltransferase inhibitor.
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| 25. | Clemastine inhibits both the vasoconstrictor and vasodilator effects of histamine.
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| 26. | Antihistamines do not chemically inactivate or prevent the normal release of histamine.
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| 27. | Levocetirizine is an inverse agonist that decreases activity at histamine H1 receptors.
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| 28. | It does not prevent the actual release of histamine from mast cells.
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| 29. | Trimethaphan causes a histamine release which further lowers blood pressure.
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| 30. | Alcohol is known to have close interactions with histamine release.
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