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Give definition of antihistamine drug with name and uses
Give definition of antihistamine drug with name and uses
Previous Year Question Papers | Science
Give definition of antihistamine drug with name and uses

Antihistamines are the drugs that prevent the production of histamine and fight against the allergy effect. Chlorpheniramine promethazine are common antihistamine drugs which are used to control the energy effect produced by histamines

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At a certain location in Africa, a compass points $12^{\circ}$ west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points above the horizontal. The horizontal component of the earth’s field is measured to be $0.16 \mathrm{G} .$ Specify the direction and magnitude of the earth’s field at the location.At a certain location in Africa, a compass points $12^{\circ}$ west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points above the horizontal. The horizontal component of the earth’s field is measured to be $0.16 \mathrm{G} .$ Specify the direction and magnitude of the earth’s field at the location.