Khloé Kardashian Odom is keeping her head up.
Lamar was arrested for the misdemeanor in the San Fernando Valley after a California Highway Patrol officer saw him "driving in a serpentine manner" on the 101 freeway, according to Public Information Officer Leland Tang.
Lamar was taken into custody on $15,000 bail and booked at the local jail at 3:54 a.m.
Following the NBA veteran's arrest, a source told E! News exclusively "Khloé and the family are urging Lamar to seek treatment."
"Khloé has been trying so, so hard to keep him from hitting a bottom like this," the source added. "But if this is what needed to happen, then this is what needed to happen."
The E! star has been focused on "getting Lamar better," the source explained, but is hoping Friday's arrest "will be his wake-up call."