The **ACTG1P23** gene is classified as a pseudogene and is often a part of the **actin gene family**, specifically related to the **ACTG1** gene that encodes gamma-actin. Pseudogenes are segments of DNA that resemble functional genes but have lost their ability to encode proteins due to mutations. Here’s a detailed overview addressing your requests:

### 1. Associated Genes
While the specific summaries from NCBI and UniProt may not list associated genes, the ACTG1P23 gene is generally related to other genes in the actin family, including:
- **ACTG1 (Alpha-cytoplasmic actin)**: Encodes one of the major actin proteins, which is critical for muscle contraction and other cellular functions.
- **ACTB (Beta-actin)**: Another member of the actin family that serves important roles in cellular structure and motility.
- **ACTA1 (Alpha-skeletal muscle actin)**: Involved in muscle function and structure.

Additionally, it may be associated with various regulatory and structural protein genes that interact with actin.

### 2. Aging and Age-related Diseases
As of now, the ACTG1P23 gene specifically does not have direct studies linking it to aging or age-related diseases, mainly because it functions as a pseudogene and is not typically involved in coding functional proteins. However, given its relation to the **ACTG1** gene and the role of actins in cellular processes, any dysfunction in the actin framework could theoretically contribute to cellular aging processes or diseases like sarcopenia, which is characterized by loss of muscle mass and strength in older individuals.

### 3. Drug Interactions
There are no specific drugs or drug classes directly associated with ACTG1P23 as it is a pseudogene. However, given that many actin-related genes play roles in cytoskeleton dynamics, drugs targeting actin-related pathways may indirectly affect biological functions related to this gene. Some common drug types that influence actin dynamics include:
- **Cytochalasins**: These are natural products that prevent actin polymerization and interfere with the cytoskeleton.
- **Latrunculins**: Compounds that sequester actin monomers, thereby disrupting actin filament formation. 
These drugs are not specific to ACTG1P23 but do impact cellular processes where actin is involved.

### 4. Pathways and Biological Processes
As ACTG1P23 is a pseudogene, it is not directly involved in specific biological pathways. However, its reference to **ACTG1** indicates potential involvement in several cellular pathways including:
- **Cytoskeletal remodeling**: Actins play a crucial role in maintaining the structure and function of the cytoskeleton.
- **Cell motility**: Actin is essential for processes such as amoeboid movement and cell division.
- **Muscle contraction**: While ACTG1P23 does not encode a functional protein, its related family member (ACTG1) is integral in muscle tissue dynamics.

**Biological processes linked to the actin gene family:**
- Cytoskeleton organization
- Cell adhesion
- Migration and invasion of cells
- Maintenance of cell shape 

### Conclusion
The ACTG1P23 gene is a pseudogene with ties to the actin gene family but lacks direct involvement in the expression of functional proteins, drug interactions, or specific biological pathways. Its importance is more aligned with its relationship to functional actin genes rather than direct biological activities. Further studies may illuminate wider associations involving gene regulation or non-coding RNA implications.