What is the Recommended dosage of antihistamine for hair dye allergy?

The recommended dosage of antihistamines for hair dye Allergies can vary depending on the specific antihistamine used and individual health conditions. Typically, over-the-counter antihistamines like diphenhydramine can be taken at a dose of 25-50 mg every 4-6 hours, not exceeding 300 mg per day. However, it's essential to consult a healthcare professional for personalized advice and to ensure safety, especially if taking other medications or if there are underlying health issues.