Non sedating h1 antihistamines Free sex chat rooms strangers


22-Sep-2017 07:45

We have drugs that selectively block both kinds of histamine receptors.

The common antihistamines (Benadryl, Chlortripalon, Atarax, Claritin, Seldane, and Hismanal) are H1 blockers.

To get a good idea of what histamine can do, let us imagine the effects of an injection of a small amount of histamine: Headache is felt as a pulsating, whole-head pain, often with a sense of pressure.

Fast heart, blood pressure falls, irregular beats with alarming palpitations.

Almost everyone has taken an antihistamine to treat hay fever, itching, to relieve nausea and vomiting, in tablets and syrups used to treat cough and cold symptoms, or as an aid to sleep.

The popularity of antihistamines is a mute testimony to the diverse negative effects of histamine.

The sedating antihistamines are derived from different chemical groups.

Here are some examples: Dimenhydrinate (Gravol) 50-100 mg qid Diphenhydramine (Benadryl) 25-50 mg qid Alkylamines Chlorpheniramine (chlortipalon) 4 mg tid Dexchlorpheniramine 2-4 mg tid Phenothiazines Promethazine (Phenergan) 10-25 mg bid Piperazines Hydroxyzine (Atarax) 10-25 mg tid Piperidines Cyproheptadine (Periactin) 4 mg tid Azatadine (Zadine) 1-2 mg tid Unwanted effects are common with these antihistamines, the commonest being sedation, dizziness fatigue, insomnia and dry mouth. Alcohol increases the sedative effects of these drugs and users are advised to abstain from drinking while on antihistamine therapy.

A single bedtime dose of 8.0 mg of chlopheniramine will block allergy symptoms for 24 hours and is often adequate for hay fever relief or relief from skin itching.

Skin sensations local itching or burning sensation, flushing and a disagreeable heat.

Stomach pain acid secretion increases; small intestine contracts with crampy pain Respiratory - nose swelling, congestion, sneezing and wheezing.

The ability to drive and operate machinery is impaired and should be avoided.

Anticholinergic action may cause urinary retention, precipitate glaucoma, and aggravate dementia.The following drugs are shown with generic name, trade name, common dose, onset and duration of action.



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