Doctor Talks Possible Side Effects of Drug in 'Cold Medicine Murder' Case

Dr. Roshim Raj says Coricidin is for patients with high blood pressure.

A husband has appeared in court for the first time since claiming he found his wife stabbed to death after he had taken too much cold medicine.

Read: Man Tells 911 He Woke From a Dream to Find Wife Stabbed in Their Bedroom: 'I Think I Did It'

In his 911 call, made Friday at about 1 a.m., Matthew Phelps said he had a dream, turned on the lights and found his wife was dead on the floor.

“I have blood all over me and there's a bloody knife on the bed and I think I did it,” the 29-year-old added.

Phelps is now charged with the murder of his 29-year-old wife, Lauren Ashley-Nicole Phelps.

When police arrived at their Raleigh, N.C., townhouse, they found her lifeless body had sustained multiple stab wounds. She was a Sunday school teacher and her husband was studying to be a pastor.

Her husband sounded out of it when he called 911. He blamed what had happened on his cold medicine.

“I took more medicine than I should have,” he said. “I took Coricidin cough and cold because I know it can make you feel good, so... A lot of times I can't sleep at night.”

Coricidin is over-the-counter cold medicine made for patients with high blood pressure.

Read: Arrest Made in 1999 Cold Case Murder of Prosecutor Found Dead in Bathtub

Inside Edition asked Dr. Roshini Raj about possible side effects if you take too much.

"This medicine does contain ingredients that could potentially cause delusions, hallucinations, agitations, euphoria, or even psychosis," she said. 

The drug, which is made by Bayer, is available at most pharmacies.

"Bayer extends our deepest sympathies to this family," Bayer said in a statement. "Patient safety is our top priority, and we continually monitor adverse events regarding all of our products. There is no evidence to suggest that Coricidin is associated with violent behavior."

Watch: The Other 'Keepers': How a Priest Got Away With the Murder of a Nun for 2 Decades