A cough lasting 5-6 months is considered chronic, and if it has not improved with multiple medicines, it is important to look for the exact cause rather than trying more antibiotics like Forcef. Allergic cough is often linked to conditions such as asthma, post-nasal drip from allergies, or acid reflux, and each of these needs a different type of treatment. Antibiotics usually do not help unless there is a clear bacterial infection, and the dizziness and drowsiness you felt may be side effects or unrelated reactions. The next best step is to get a proper evaluation; your doctor may suggest tests like a chest X-ray, lung function test, or allergy assessment to find the root cause. In the meantime, avoid triggers like dust, smoke, and cold air, stay hydrated, and continue any prescribed inhalers or anti-allergy medicines as advised. Do not self-medicate repeatedly, and seek a specialist (like a pulmonologist) if the cough persists, so you can get targeted and effective treatment.