The RNA5SP423 gene is a non-coding RNA gene that encodes for a small nucleolar RNA (snoRNA) involved in the biogenesis of ribosomal RNA. While detailed information is often limited for non-coding RNAs compared to protein-coding genes, below is a comprehensive overview based on the available data:

### General Characteristics:
- **Gene Symbol**: RNA5SP423
- **Gene Type**: Non-coding RNA (snoRNA)
- **Function**: Primarily involved in the processing and modification of rRNA.

### 1. Associated Genes:
While specific associations may vary by study and database, snoRNAs often function in complexes with other RNA molecules, such as:
- **Other snoRNAs**: These have similar roles in rRNA modification.
- **Ribosomal Protein Genes**: Many ribosomal proteins interact with snoRNAs during ribosome assembly.
- **Protein-coding Genes**: Some studies indicate associations with genes involved in ribosome biogenesis and processing.

### 2. Aging and Age-Related Diseases:
Currently, there is limited direct evidence regarding the association of RNA5SP423 with aging or age-related diseases. However, snoRNAs have been implicated in various cellular processes:
- Abnormalities in snoRNA expression have been linked to cancer and other diseases, which can be influenced by aging.
- Changes in rRNA processing and modification due to snoRNA dysfunction might contribute to declines in mitochondrial function and protein synthesis capacity associated with aging.

### 3. Drug Interactions:
No specific drugs or drug classes are known to directly interact with the RNA5SP423 gene. However, various compounds that affect gene expression, including:
- **Antisense oligonucleotides**: These may be designed to target snoRNAs, although no specific candidates are established.
- **Small molecules**: Some may alter nucleolar dynamics or ribosome biogenesis but do not specifically target RNA5SP423.

### 4. Pathways and Biological Processes:
RNA5SP423 is primarily involved in:
- **Ribosome Biogenesis**: The synthesis and modification of rRNA components.
- **snRNP Assembly**: Contributing to the formation of small nuclear ribonucleoproteins involved in mRNA processing.
- **RNA Modification Processes**: Including 2’-O-methylation and pseudouridylation of rRNA, which are crucial for ribosomal function.

### Additional Notes:
Research on the implications of snoRNAs like RNA5SP423 in health and disease is ongoing. Functional studies and experiments are needed to further elucidate any relationships with aging, diseases, or drug interactions. As non-coding RNAs continue to be recognized for their regulatory roles in gene expression, their study is increasingly relevant within the fields of genomics, developmental biology, and medical research. 

For specific findings, exploring databases such as the NCBI Gene database, KEGG pathways, or Reactome could yield more targeted studies related to the RNAs of interest.