Gabapentin capsules are primarily used for which conditions?

Gabapentin capsules are primarily used to manage nerve pain and can also serve as a mild sedative. This medication is an anticonvulsant that works by modulating the activity of certain neurotransmitters in the brain, making it effective in reducing the perception of pain associated with conditions like neuropathy. Additionally, it can provide calming effects, which is why it's sometimes used for anxiety or to help sedate animals for certain procedures.

The other options do not encompass the primary uses of gabapentin. While heart disease and hypertension, respiratory issues, and gastrointestinal disorders may require specific treatments, these conditions do not typically involve the use of gabapentin. This distinction underscores the drug's specific application and effectiveness in targeting nerve-related pain and its sedative properties.