Allergy & Sinus Shop for allergy and sinus medication at Well.ca. We have allergy and sinus medicine for adults as well as children's allergy and sinus medicine. We also carry nasal spray for allergy treatment and sinus relief. If you have seasonal allergies, skin allergies, cat allergies, poison ivy or pretty much any allergic reaction, you can count on products like the Benadryl Allergy Liquid Elixir or Reactine Allergy Extra Strength 24 Hour Tablets for quick and effective relief. If you have a sinus infection or a sinus headache, we can help with that too! Try Sudafed Sinus Advance with Ibuprofen or Sinutab Extra Strength Sinus for relief of sinus pain and headache. Browse some of our most popular allergy and sinus brands like Drixoral, Benadryl, Reactine, or Tylenol.