Ashraf Al-Qudra said hospitals stores had already run out 150 medicines and 160 types of medical equipment.
The shortages were particularly critical in light of Israel's recent bombardment of the coastal enclave, he added.
Israeli forces have launched multiple airstrikes on Gaza since Thursday, killing 14 Palestinians and wounding more than 40.
Al-Qudra urged international relief organizations to supply hospitals with medical needs and called on the Ramallah ministry to transfer allocated medicine to Gaza.
Maan News Agency