Thailand's beloved and influential king was hospitalized Saturday after feeling weakness on the right side of his body, the royal palace said. King Bhumibol Adulyadej has suffered a number of medical ailments in recent years, according to a report of The Associated Press. The 79-year-old King Bhumibol Adulyadej was admitted to Bangkok's Siriraj Hospital, where tests found a slightly inadequate blood flow to the brain, a palace statement said. His condition improved after doctors administered medicine for eight hours, the statement said. He was kept in the hospital for monitoring. Bhumibol, the world's longest-serving living monarch, is a unifying figure in Thailand. People usually turn to him in times of crisis, even though -- strictly speaking -- his powers are limited as a constitutional monarch.