Caffeine warning: The recommended dose of this product contains about as much caffeine as a cup of coffee. Limit the use of caffeine-containing medications, foods, or beverages while taking this product because too much caffeine may cause nervousness, irritability, sleeplessness, and, occasionally, rapid heart beat.
The list of signs and symptoms mentioned in various sources for Hartnup Disease includes the 23 symptoms listed below: 1  Itchy rash only on light exposed areas. 2  Headache. 3  Intermittent ataxia. 4  Abdominal pain. 5  Chest pain. 6  Pain in the extremities. 7  Crying spells. 8  Mental retardation if untreated. 9  Fainting.
1 Flu-like Symptoms. 2  Some people actually experience flu-like symptoms, called oculorespiratory syndrome, which include conjunctivitis, cough, wheeze, tightness in the chest, sore throat, or a combination. 3  Such symptoms tend to occur 2 to 24 hours after the vaccination and generally last for up to 2 days.