Right, H2 blockers also mimic the effects of H1 blockers (antihistamines). Thus, they will reduce swelling, including in the nasal passages by blocking histamin

Right, H2 blockers also mimic the effects of H1 blockers (antihistamines). Thus, they will reduce swelling, including in the nasal passages by blocking histamines. Amongst other side effects - antihistamines inhibit/block tanning.