Doctors say it's extremely rare but Singulair, a common allergy medication, could lead to trouble sleeping and even to depression.

Local doctors say you shouldn't worry. Allergy experts say it's a fine medication.

Allergies are more than just an annoyance for Tausha Dybdol's son.

"It's really been a good drug for us," Tausha says. "We have not seen any negative relations to it."

Singulair has made life easier for Tausha's seven-year-old who has been on the medication since the age of 18-months.

It's a popular prescription that's getting a lot of bad press.

Tausha says, "I'm not second guessing with my child because it's been proven to me over the seven years that he's been taking it that obviously he's not having that problem."

That problem: a few parents say Singulair might have contributed to their children experiencing depression or even suicidal thoughts.

Pediatric physician Dr. Mark Wilson at Omaha's Children's Hospital says don't rush to any judgment. The medication is effective and proven safe.

Dr. Wilson says, "We haven't changed our prescribing habits at all. We're not asking patients to discontinue Singulair."

The most common side effect, if any, is a headache.

Dr. Wilson adds that some children, and even young adults, might be depressed before even taking Singulair.

"We haven't seen anything that we think is directly related to Singulair at this point," he says. "I think that's what the key message should be: there's no causal relationship that's known at present."

The Food and Drug Administration is reviewing the issue after receiving reports of mood changes in patients taking the drug. It could take nine months to complete that review.