Suggest Alternate Cough Suppressants
Steam, saline gargles, local decongestants and herbal remedies may help
Detailed Answer:
Hi! Welcome to health care magic! Thanks for sharing your concerns with us. We will try to help you in best way possible. First of all, it is sad to know what your husband is going through.
Based on the history you have shared, it seems as if complete resolution of cough may be impossible as the irritation in respiratory tract may induce coughing bouts over and again.
Some supportive measures like steam inhalations and using saline water gargles will help to decrease the irritation and keep air way moist and may lead to decreased cough. Also using local decongestant sprays may cause dilation of air ways and lead to less resistance and decreased irritation so in turn cause reduced cough. Some herbal remedies including the herbs which contain ammonium chloride, can be used as chewing or their extracts in warm water may be drank to cause symptomatic help.
Wishing him a healthy recovery. Hope this has answered your query, if you have any more questions, feel free to ask. Regards.