Two women throw flour at Guatemalan Vice President Roxana Baldetti as she leaves the capital's National Theatre on Tuesday (January 14).
The incident marred President Otto Perez Molina's state of the nation address.
Police arrested four people after the flour attack.
Baldetti was taken to hospital on a stretcher. She said she had difficulty breathing.
Security was tightened at the event, where the president was reporting on progress in tackling child maltnutrition.
