The OR8X1P gene is an olfactory receptor gene involved in the detection of odorant molecules in the nasal epithelium, playing a critical role in the sensory perception of smell through G-protein-coupled receptor mechanisms. Below is the detailed information about this gene, along with your specific requests:

### 1. Associated Genes
The OR8X1P gene is a pseudogene of the olfactory receptor family. As a pseudogene, it may not be functionally active in the same way as typical genes; however, it is related to other olfactory receptor genes. Some of these include:
- **OR8X2**: Another olfactory receptor gene that is closely related to OR8X1P.
- **OR8K2** and **OR8D1**: Other members of the olfactory receptor gene family that may hold functional relevance or share similar pathways.

### 2. Aging and Age-Related Diseases
Currently, specific research linking OR8X1P directly to aging or age-related diseases is limited. However, olfactory receptors, including those in the OR gene family, are known to play a role in the sensory decline often observed with aging. Changes in olfactory function can often be one of the early signs of neurodegenerative diseases, such as Alzheimer's disease and Parkinson's disease. While specific associations for OR8X1P in these contexts are not well-documented, the variable functioning of olfactory receptors may contribute to the broader context of sensory decline with age.

### 3. Drug Interactions
As an olfactory receptor, OR8X1P is not typically associated with direct pharmacological interventions; however, odorant compounds that interact with olfactory receptors can have varying effects. 
- **Odorant Ligands**: Various volatile organic compounds, classified as odorant ligands, may show some level of interaction, but there are no well-defined drugs or drug classes specifically targeting OR8X1P.
- Olfactory receptors are involved in the perception of certain drug scents (e.g., aroma compounds in pharmacology), which indirectly highlights their role but does not denote direct pharmacological interaction.

### 4. Pathways and Biological Processes
OR8X1P, like other olfactory receptors, participates in several established signaling pathways and biological processes:
- **Olfactory Signaling Pathway**: Fundamental for transducing odorant signals into a neuronal response.
- **G-Protein Coupled Receptor (GPCR) Signaling**: Involvement in GPCR signaling pathways, which facilitate various physiological responses based on environmental stimuli.
- **Sensory Perception of Smell**: Essential for the recognition of odorants and converting these stimuli into action potentials to the brain.

In summary, while the OR8X1P gene may not have specific associations with aging or pharmacological interventions, its role in olfactory perception is critical, and it is part of a broader family of olfactory receptors that contribute to sensory processing and potential implications in age-related sensory decline. Further research into specific gene interactions or effects related to aging will be necessary to elucidate its function in these contexts.