Alex syrup has been recommended for you as you may be suffering from dry cough.
Cough is a reflex that helps clear your airways of irritants. Nerves in the airways become stimulated by allergens and other irritants, resulting in a forceful expulsion of air from the lungs.
A patient is said to have dry cough when no phlegm or mucus is produced. Dry cough is also known as non-productive cough. It causes irritation and is normally associated with a tickly throat. Dry coughs are often caused by viral illnesses such as colds and flu. Dry coughs can also be due to allergies or throat irritants.
A dry cough itself is not contagious but the airborne droplets in the cough can spread a viral or bacterial infectious disease. The infecting pathogen can be contagious not the cough itself. Sometimes a dry cough can induce Vomiting. This can be a reflexive action and a means to remove irritating material from the stomach.
Most importantly, you need to visit your doctor immediately, if you have a cough that lingers for weeks and more so if it brings up sputum or blood, disturbs your sleep or affects work life.