Frequent colds are viral, so antibiotics won't prevent or cure them. To prevent colds, focus on hand hygiene, an annual flu vaccine, and daily Vitamin C, Vitamin D, or Zinc supplements. If your colds are actually allergies, daily antihistamines can prevent symptoms. To treat active symptoms, use paracetamol or ibuprofen for aches, decongestant nasal sprays (for up to 3 days) for stuffiness, and cough lozenges. Rest and hydration are essential. Because you get sick frequently, please consult a healthcare provider to rule out underlying issues like allergies, asthma, or vitamin deficiencies.