The REXO1L8P gene is a member of the REXO1 gene family, which is associated with RNA metabolism and stability. It is classified as a pseudogene, which means that it is a non-functional gene that has lost its protein-coding ability due to mutations or deletions. Below are further details on the REXO1L8P gene, incorporating the requested points:

### 1. Associated Genes
While specific details regarding genes directly associated with REXO1L8P are not extensively documented, pseudogenes can often be linked to their functional gene counterparts. REXO1 (the functional gene) could be considered when discussing associations. Additionally, other members of the REXO family (like REXO2) might be relevant in discussions of genetic networks.

### 2. Aging and Age-Related Diseases
Currently, there is limited direct information linking REXO1L8P to aging or age-related diseases in the literature, primarily due to its status as a pseudogene. However, gene families involved in RNA metabolism can have indirect roles in the aging process or the development of age-related diseases, as RNA stability and processing are crucial for cellular function and maintenance. Further research may elucidate any specific connections.

### 3. Drug Interactions
As REXO1L8P is a pseudogene, it is not typically involved in drug interactions directly nor does it encode a protein that serves a target for pharmacological compounds. However, given its association with the REXO gene family, it can be part of broader studies on RNA metabolism drugs or interventions that might affect REXO1 or other related pathways.

### 4. Pathways and Biological Processes
Since REXO1L8P does not encode a functional protein, its direct involvement in biological pathways is not characterized. However, the functional REXO1 gene is implicated in several biological processes, which may include:

- **RNA Processing**: Implicated in the maturation and stability of various RNA species.
- **Cellular Response to Stress**: Potentially involving mechanisms of stress and survival through RNA stability.
- **Gene Expression Regulation**: May impact how genes are expressed by influencing RNA metabolism.

Given the evolutionary history and functional loss of REXO1L8P, research might focus more on its ancestral gene’s impacts rather than on REXO1L8P itself.

### Conclusion
The REXO1L8P gene serves as an interesting example of genomic evolution as a pseudogene. While its direct roles and associations may be limited due to its noncoding nature, understanding its relationship to functional family members could provide insights into RNA metabolism and ways it could relate to broader biological processes, including aging and disease. Further direct studies would be necessary to clarify its potential roles and interactions in health and disease contexts.