Summary of agonist-antagonist interactions on EUS function.
| Drugs | EUS | ||
|---|---|---|---|
| Agonist | Antagonist | Bursting | Tonic Activity |
| L-DOPA (DA precursor) | Increased (+) | Suppressed (–) | |
| SCH 23390 (DR1 antagonist) | Reverses | Reverses | |
| Remoxipride (DR2 antagonist) | No effect | Slightly increased | |
| APO (DR antagonist) | Increased (+) | Suppressed (–) | |
| SCH 23390 (DR1 antagonist) | Reverses | Reverses | |
| Remoxipride (DR2 antagonist) | No effect | Slightly increased | |
| Quinpirole (DR2 agonist) | Increased (+) | No effect | |
| Remoxipride (DR2 antagonist) | Reverses | No effect | |