Sublingual immunotherapy is an alternative to allergy shots that is being used in 40% of allergy treatments in Europe. Hayfever sufferers in the U.S. can subject themselves to allergy shots to desensitize their immune systems to pollen, but the sublinqual technique hasn’t caught on yet. Administering the allergen under the tongue may not be as effective as a shot, but a regular doctor’s visit isn’t required to administer it, not to mention the lack of a needle.