What fluid to mix procainamide for in a procainamide challenge?

Procainamide is typically mixed with normal saline or dextrose 5% in water (D5W) for a procainamide challenge. Normal saline is preferred due to its isotonic nature and compatibility with intravenous administration. It's crucial to ensure the solution is well-mixed and administered according to the prescribed dosage and protocol during the challenge. Always follow institutional guidelines and protocols for preparation and administration.