Between Homoharringtonine (HHT) and cytosine arabinoside(Ara), Synergism was found in 16. 4%, antagonism in 14. 5%,additivity in 69% of the 110 observations.

• HA方案中 HHT和 Ara－c间相互作用形式，协同 作用占 16.；4%25，十力作用占69%25，桔抗作用占14