Hi Edwo, Welcome here, and my condolences to your wife, along with my best wishes for a complete victory over her Cancer.

The nausea is likely the result of the chemo, all platinum based agents (both cisplatin and carboplatin are platinum based agents, with cisplatin being generally "stronger," or having more severe side-effects), but I don't know about the coughing.

My experience is that the -platins also cause hiccups. Minor PITA by itself, but when you have all the other stuff going on that Cancer treatments entail, it could be causing the coughing also.

Or, as say, it could be a bug.

It could also be a histamine reaction to environmental conditions, like (especially) Oak pollen or other pollen. 'Tis the season, you know.

Best wishes!

Bart