I have had mucus on my throat for around 3 months now. I believe it is being caused by snot running down from my nose onto my throat. I have tried 2 sets of anti-biotics; several types of decongestants; Nasophan Acqueeous nasal spray; Vit-C; Despite all the above, I am still getting a runny nose and Mucus on my throat that causes a constant cough that means I am having to expel mucus from my throat all day and night. I live in South Africa (Cape Town) and aside from the above, I feel fit and well. I have no known allergies.