Rob Kardashian has publicly struggled with his weight gain, from skipping family functions to changing social media practices.  A close friend told In Touch the reality star is actually self-medicating to cope with his challenges.

Kardashian is allegedly using prescription painkillers, marijuana, and sizzurp, which combines sugary soda and cough syrup. In the weeks leading up to the Kimye wedding, he allegedly sat around in his Sherman Oaks condo doing drugs all day.

 "He'd just lie around his place smoking weed, doing drugs, watching movies and eating. He said he 'needed' the pills," the friend explained.

He even left the wedding early with reports claiming he was too embarrassed to pose in pictures, but Kardashian's friend said that was not the only reason.

"The reason he left Kim's wedding wasn't just that he was embarrassed to pose in photos," the insider revealed to the mag. "He only knows how to party to excess. He is so depressed and needs help."

According to The Daily Mail, Kardashian has been reaching out to sister Khloe's ex Lamar Odom for help.

"Rob really misses Lamar; he was like a big brother to him," a source said. ''Lamar really helped Rob with his problems when it came to wanting to lose weight, and they've never lost touch."

Kardashian fired back at weight loss critics after leaving Paris early, skipping the wedding of the century.

"So i found out i was trending for being fat...thank you all it really made my day," he tweeted.

"And to the blogs saying i went to fat camp or rehab LOL then why am i still fat u fools?? y'all must have run out of real news," he continued.

"First, i don't believe in rehab or therapy or anything of that sort and second I'm a grown man and will work on myself when i choose. I'm aware that I'm fat that def aint a surprise to me lol and my only therapy will be in the gym anyways had to say somethingggggggggg."

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