Pharmacology H1 antihistaminics afford benefit in a number of conditions. All of the following conditions are benefited by antagonism of histamine : A Dermographism B Insect bite C Common cold D Seasonal hay fever 💡 Explanation H1 antihistaminics afford benefit in a number of conditions. All of the following conditions are benefited by antagonism of histamine : ✓ Correct Answer: C. Common cold