| abstract |
The present inventors have surprisingly found that antacid acid or its ester, derivative, salt or composition in combination with an anti-tumor drug provides unexpected efficacy in inhibiting tumors while maintaining normal cell viability. In addition, in view of the fact that phthalic acid or an ester derivative, salt or composition thereof plays a role in adjuvant therapy, the amount of the antitumor drug in the chemotherapeutic treatment can be combined by using antacid acid or an ester derivative thereof, The salt or composition is reduced. |