The RNU6-664P gene is classified as a small nucleolar RNA (snoRNA), which plays a role in the modification and processing of ribosomal RNA (rRNA). It is part of the U6 small nuclear RNA (snRNA) family, which typically participate in mRNA splicing. As a pseudogene, RNU6-664P may not have a direct functional role but can be important in regulatory contexts or as a part of gene expression dynamics.

### 1. Associated Genes
While specific associations with other genes are typically not widely reported for pseudogenes, small nucleolar RNAs can sometimes be indirectly linked to the expression of related genes involved in ribosomal biogenesis and RNA processing. Genes involved in the processing of snoRNAs, such as components of the box C/D and box H/ACA complexes (e.g., DKC1, NOP56), could be associated in functional studies, although direct associations specifically for RNU6-664P have not been extensively documented.

### 2. Aging and Age-Related Diseases
At present, there is limited literature directly connecting the RNU6-664P gene to aging or age-related diseases. However, dysregulation of snoRNAs generally has been implicated in various age-related conditions and cancer. Changes in the expression profiles of small RNAs, including snoRNAs, can occur with aging and may contribute to cellular stress responses, altered cellular signaling, and malignancy, but specific studies regarding RNU6-664P in this context are likely sparse.

### 3. Drug Interactions
Specific drug interactions with RNU6-664P have not been well characterized. Typically, snoRNAs and pseudogenes are indirect candidates for drug actions, largely due to their roles in the regulatory networks rather than specific target pathways or enzyme activities. Research on small RNAs and their interactions with therapeutic agents is ongoing, and as such, no specific drug class connections can be confidently established for RNU6-664P at this time.

### 4. Pathways and Biological Processes
RNU6-664P is primarily involved in processes related to the assembly and processing of ribonucleoproteins. Its contributions may include roles in:
- **mRNA splicing:** as part of the broader U6 snRNA family contributing to spliceosome assembly.
- **Regulation of small nucleolar RNAs (snoRNAs) expression:** providing insight into pseudogene functionality through competitive RNA elements or transcriptional regulation.
- **Ribosome biogenesis:** contributing indirectly to the overall regulation of ribosome production and rRNA modification.

In summary, much of the information concerning RNU6-664P aligns with its designation as a small nucleolar RNA and pseudogene, with indirect implications in RNA processing, potential regulatory roles, and connections to broader biological processes without strong associations established yet concerning aging or drug interactions. More research would be beneficial to clarify its functional significance and related pathways.