Non Drowsy. Headache and Fever. Blocked or Runny Nose. Body Aches and Pain. Sore Throat. Other Not suitable for children under 12 years of age., Do not use with other medicines intended to treat the symptoms of the common cold., Phenylephrine may cause sleeplessness in some people., Prolonged or excessive use can be harmful., Do not use more than 48 hours except on doctor's advice..