**Study Overview:** This study is for patients with *Acute Myeloid Leukemia (AML)* or *Multiple Myeloma (MM)*, which are types of blood cancers. The study aims to see if drinking tea made from the leaves of the *Annona muricata* plant, also known as soursop, helps in reducing cancer cells in patients who have tried all other treatments. **Key Points:** - **Duration:** The study lasts for 21 days. - **Participation Requirements:** Patients must have relapsed or refractory AML or MM and have no other treatment options. Participants should not have uncontrolled infections and must pass certain health checks, like liver and kidney function tests. - **Visits and Procedures:** Patients may need to undergo blood tests, and some might require a bone marrow test before and after the study. **Eligibility:** Patients should be able to understand study procedures and must not be pregnant or breastfeeding. Participants must have specific cancer cell levels in their blood or bone marrow and meet certain health criteria. **Age Requirement:** This study is generally for older adults, as AML commonly occurs in individuals aged 65-70. This study focuses on determining the safety and potential benefits of soursop tea for those who have exhausted other treatment options.