Lamar Odom Went Off the Rails Sunday Over 'Keeping Up with the Kardashians'

Lamar Odom lost it Sunday ... and the trigger was an episode of "Keeping Up with the Kardashians."

Sources at Dennis Hof's Love Ranch South tell us, Lamar seemed normal during his stay until he got a call from someone about the show. Some of the women who were around Lamar say he became irate, complaining about the way he had just been portrayed on the show.

As for what was on the show ... Khloe got 2 calls from Lamar. When she got off the phone Kim criticized Khloe for being flirty with Lamar. In another clip, Lamar called Khloe to tell her that his good friend Jamie had died. When she got off the phone she worried Lamar might spin out of control. And in another scene Khloe fled a club after she heard Lamar was trying to get in.

We're told Lamar remained upset until he was found unconscious.

Up until getting the call, people at the Ranch say Lamar was "chill." There was no evidence he had been high on drugs or alcohol. We're told when he arrived Saturday, he ordered a single bottle of cognac and when he was found unconscious a third of the bottle was left.

As we reported, people at the Ranch say Lamar had been using an herbal substitute for Viagra. Someone at the Ranch who was around Lamar tells us he was popping 8 to 10 herbal substitutes for Viagra at a time. There are perils to the drug -- it can cause dangerously low blood pressure and it can restrict blood flow to vital organs.

Another source at the ranch says Lamar was taking the actual Viagra drug from a prescription bottle.