When managing urticaria (hives) while taking cephalexin capsules, avoiding certain foods can help reduce flare-ups and interactions. High-histamine foods like aged cheeses, nuts, chocolate, bacon, seafood, and wine may worsen urticaria symptoms. High-calcium foods, such as fortified products, can hinder cephalexin capsules supplier absorption, so avoid them two hours before and after taking the medication. Acidic foods, caffeine (coffee, energy drinks), and simple sugars (honey, syrups) may exacerbate side effects like diarrhea or vaginal infections. Opt for probiotics and unsweetened cranberry juice to support gut health and reduce inflammation. Consult a healthcare provider for personalized advice.