Biomaterial Database

Inhaled antihistamines--bronchodilatation and effects on histamine- and methacholine-induced bronchoconstriction. 1978

S G Nogrady, and C Bevan

To assess further the bronchodilator activity of inhaled antihistamines ten stable asthmatic subjects inhaled aerosols of clemastine, 1 mg/ml, and saline placebo administered double blind. Subjects underwent bronchial challenge with increasing concentrations of histamine and methacholine, and specific airways conductance was measured by whole body plethysmography at each concentration. There was a significant 21.9% increase in specific airways conductance after inhalation of clemastine. Subjects could tolerate significantly higher mean concentrations of histamine when treated with clemastine than with saline. The shift of the cumulative log histamine dose-reponse curve suggests that such protection is due to competitive antagonism to the inhaled clemastine. Clemastine did not protect subjects against methacholine-induced bronchoconstriction, which suggests that its bronchodilator properties are not related to any anticholinergic action.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008688	Methacholine Compounds	A group of compounds that are derivatives of beta-methylacetylcholine (methacholine).	Compounds, Methacholine
D011759	Pyrrolidines	Compounds also known as tetrahydropyridines with general molecular formula (CH2)4NH.	Tetrahydropyridine,Tetrahydropyridines
D011897	Random Allocation	A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. It may also apply to experiments on inanimate objects.	Randomization,Allocation, Random
D012129	Respiratory Function Tests	Measurement of the various processes involved in the act of respiration: inspiration, expiration, oxygen and carbon dioxide exchange, lung volume and compliance, etc.	Lung Function Tests,Pulmonary Function Tests,Function Test, Pulmonary,Function Tests, Pulmonary,Pulmonary Function Test,Test, Pulmonary Function,Tests, Pulmonary Function,Function Test, Lung,Function Test, Respiratory,Function Tests, Lung,Function Tests, Respiratory,Lung Function Test,Respiratory Function Test,Test, Lung Function,Test, Respiratory Function,Tests, Lung Function,Tests, Respiratory Function
D012138	Respiratory Therapy	Care of patients with deficiencies and abnormalities associated with the cardiopulmonary system. It includes the therapeutic use of medical gases and their administrative apparatus, environmental control systems, humidification, aerosols, ventilatory support, bronchopulmonary drainage and exercise, respiratory rehabilitation, assistance with cardiopulmonary resuscitation, and maintenance of natural, artificial, and mechanical airways.	Inhalation Therapy,Therapy, Inhalation,Therapy, Respiratory,Inhalation Therapies,Respiratory Therapies,Therapies, Inhalation,Therapies, Respiratory
D001980	Bronchi	The larger air passages of the lungs arising from the terminal bifurcation of the TRACHEA. They include the largest two primary bronchi which branch out into secondary bronchi, and tertiary bronchi which extend into BRONCHIOLES and PULMONARY ALVEOLI.	Primary Bronchi,Primary Bronchus,Secondary Bronchi,Secondary Bronchus,Tertiary Bronchi,Tertiary Bronchus,Bronchi, Primary,Bronchi, Secondary,Bronchi, Tertiary,Bronchus,Bronchus, Primary,Bronchus, Secondary,Bronchus, Tertiary
D002974	Clemastine	A histamine H1 antagonist used as the hydrogen fumarate in hay fever, rhinitis, allergic skin conditions, and pruritus. It causes drowsiness.	Meclastine,Mecloprodin,2-(2-(1-(4-Chlorophenyl)-1-phenylethoxy)ethyl)-1-methylpyrrolidine,Clemastine Fumarate,HS-592,Tavegyl,Tavist,HS 592,HS592
D002986	Clinical Trials as Topic	Works about pre-planned studies of the safety, efficacy, or optimum dosage schedule (if appropriate) of one or more diagnostic, therapeutic, or prophylactic drugs, devices, or techniques selected according to predetermined criteria of eligibility and observed for predefined evidence of favorable and unfavorable effects. This concept includes clinical trials conducted both in the U.S. and in other countries.	Clinical Trial as Topic
D004305	Dose-Response Relationship, Drug	The relationship between the dose of an administered drug and the response of the organism to the drug.	Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response