Legendary comedian Gallagher suffered another heart attack, albeit a mild one ... just four days after he was discharged from a hospital in Texas, TMZ has learned.
According to our sources, Gallagher ran out of his heart medication and began to feel like he was having another heart attack ... so he rushed to an Arizona hospital.
A rep for the comedian tells TMZ, "Gallagher suffered a mild heart attack today at a hospital in Sedona due to complications from his previous heart attack. He is awake and resting comfortably now."
Gallagher was hospitalized on March 14 after suffering a heart attack. He was placed in a medically induced coma for a few days until he healed.