It's concerning that your cough has persisted for seven days despite taking Piriton and Levolin. Piriton CS Syrup contains chlorphenamine maleate and dextromethorphan, which help relieve cough and allergy symptoms, while Levolin (levalbuterol) is a bronchodilator used for breathing issues.

• Since your cough has lasted a week without improvement, it could indicate an underlying infection, inflammation, or another respiratory issue that needs further evaluation.
• Persistent coughs sometimes require assessment by a respiratory specialist (pulmonologist) to check for causes like bronchitis, asthma, or other lung conditions.
• Avoid self-medicating further without medical advice, especially if symptoms worsen or you develop fever, shortness of breath, or chest pain.

Please consult a pulmonologist or your primary care doctor promptly for a thorough examination and appropriate tests to guide treatment. If you experience severe difficulty breathing or chest pain, seek emergency care immediately.To narrow down potential causes, we will need some more information.Please tell me your age and gender.