DENVER, Colo. -- The warm weather is a call to get outside, but for people with allergies, it may not be an option.

"Trees, flowers, pollens; I am [allergic] to pretty much everything," said Kathy Myers.

For 30 years Myers has suffered with allergies. Ten years ago she underwent a regiment of allergy shots to build up her immunity to certain items she was allergic to.

"It worked for 10 years," said Myers.

Now she is trying a new allergy remedy called sublingual immunotherapy that is administered by doctors at NextCare Urgent Care. Every day she takes drops underneath her tongue.

"It's much easier for the patients," said Dr. Jerald Solot, of NextCare Urgent Care. "Patients can do this at home every single day in front of the mirror."

Solot has been doing sublingual immunotherapy for over a year at his clinics.

"Our success rate with this has been spectacular," said Solot.

But doctors at National Jewish Health, who are studying sublingual immunotherapy, caution people.

"It should be used in control clinical trials," said Dr. Hal Nelson, an allergist at National Jewish. "It should not be used clinically."

Nelson said the drops are not dangerous, but not enough studies have been completed here in the United States.

"The studies that have been done in Europe that show it works have only been done with a [single item people are allergic to]," said Nelson. "There is a study that was done [in the United States] that suggests sublingual may be less effective if you mix several extracts together and try to give them at the same time."

Doctors at NextCare Urgent Care disagree. They believe patients do better with multiple antigens instead of just one.

At NextCare Urgent Care all patients are given the same drops, which contain 60 antigens. When patients get allergy shots, the liquid that is injected into a patient is determined based upon what the patient is allergic to.

Myers said she is too busy to go back to allergy shots so for now, the drops are worth a try.