Uses Temporary relief of occasional headaches and minor aches and pains with accompanying sleeplessness. Stop use and ask a doctor if Sleeplessness persists continuously for more than 2 weeks. Insomnia may be a symptom of serious underlying medical illness. Pain gets worse or lasts more than 10 days. Fever gets worse or lasts more than 3 days. Redness or swelling is present. New Symptoms of serious.