Lauren Phelps Murder

I pulled this from an article online. Basically this guy apparently stabs his wife to death in his sleep and blames it on taking too much cold medicine.

"I think I killed my (wife) …" a man's low voice says on the phone.

The 911 operator asks him to elaborate: "What — what do you mean by that? What happened?"

"I had a dream and then I turned on the lights and she's dead on the floor," the man says. "Um, I have blood all over me and there's a bloody knife on the bed and I think I did it."

So begins a disturbing 6½-minute call, made just after 1 a.m. Friday, in which North Carolina resident Matthew Phelps, 27, appears to confess to killing his wife, Raleigh police said.

"I took more medicine than I should have," Phelps says. "I took Coricidin … because I know it can make you feel good. So a lot of times I can't sleep at night, so I took some. … She's not moving. Oh my God."

Matthew Phelps was arrested Friday and charged with murder. He is being held without bond at the Wake County jail and is scheduled to make a court appearance Tuesday, according to court records. An attorney for Phelps was not listed

Apparently people take this OTC cold medicine in order to get high. In the past few years there has been a 300% increase in calls to poison control centers regarding the drug, Dextromethorphan which is found in Coricidin. Supposedly one of the side effects is hallucinations.

Question: what do you guys think about this? Is it plausible that he just "woke up" to his wife dead or is it just a lame excuse?