SATURDAY, Feb. 27 (HealthDay News) -- Most patients who have a history of penicillin allergy can safely take antibiotics called cephalosporins, U.S. researchers say.

SATURDAY, Feb. 27 (HealthDay News) -- Long-term use of marijuana can lead to increased risk of developing hallucinations, delusions and psychosis, a new study shows.

SATURDAY, Feb. 27 (HealthDay News) -- Help may be on the way for children with serious peanut allergies, with two new studies suggesting that slowly increasing consumption might build kids' tolerance over time.

SATURDAY, Feb. 27 (HealthDay News) -- A blood test may help identify children with milk allergy who can tolerate baked-milk products and those who may have a serious allergic reaction to any form of cow's milk, a new study shows.