The rapper, 30, was rushed to Cedars-Sinai Hospital earlier this week after suffering from further seizures. His prognosis is thought to be "uncertain".
A tweet sent at 6.28pm local time (1.28am UK time) from Wayne's account said that he is "good", but TMZ reports that Wayne is currently sleeping so could not have tweeted.
Despite being released from hospital on Wednesday (March 13), Wayne suffered another seizure hours later and was hospitalised again.
He had been placed in an induced coma and was in an "unstable" condition, according to the gossip site. He was said to be breathing through tubes.
Doctors reportedly found high amounts of codeine in the star's system and his stomach was pumped three times.
Wayne was originally treated last October after experiencing convulsions and later confirmed that he is taking medication for the condition.