He is the longest serving prime minister in the Pacific region.
In his weekly radio interview, Tuila'epa said doctors had reassured him he was in good health with a heart that beats like a jet engine.
He succeeded the former Prime Minister Tofilau Eti Alesana.
Tuila'epa has been an MP since 1980 after working as a public servant and a diplomat.
Source:
RNZ Pacific