Solve this exciting clinical case specific to your field of interest via Docplexus’ Clinical Case Challenge. Join your fellow doctors to discuss and answer today’s challenge. Case presentation   A 17-year-old high school American football player presented with repeated muscle cramps during games. He had a history of cystic fibrosis (CF) and seizures. Earlier CF clinic examination   ·       Muscle cramps occur during the second half of games and exercises.

·       Muscle cramps occur predominantly in the lower extremities and rarely in the upper extremities and abdomen. ·       Muscle cramps persist from 30 minutes to 3 hours. ·       Serum sodium – 121 mmol/L   A nutritionist suggested the patient to consume salt tabs on the days of the game and drink 2 to 3 bottles of sports drink and up to two bottles of pediatric electrolyte solution during the games. However, even after…