According to this, Shannon Miller still performs on the 4 inch beam:
[quote]"I am still performing so it is essential for me to be able to focus on the four-inch balance beam without being distracted by my allergies, so I can't risk taking an allergy medication that may make me drowsy," says Miller. "Now I take Claritin because it works hard to provide relief from my worst allergy symptoms all day without making me drowsy. Whether I'm speaking professionally, spotting children at gymnastics clinics, or hosting my own television show, I need to stay alert and focused so I can perform my best."[/quote]
"Coping with Allergies: How World Champion Gymnast Shannon Miller Manages her Allergy "