Yikes! Yeah, I would avoid any possible allergic reaction! Wow, that would, um, bite?

Sorry, couldn't help it.

Have you been told about the salt water rinsing? I used a combination of salt and baking soda in warm water, and it really did help. I sure hope this is part of his routine? If not, again, don't just try it, but get the right advice.

47 yr old male non-smoker, social drinker, fit. Jan'10, Stg3 rt tonsil+rt neck SCC, HPV+, rad+chmo Vancouver Cda. 2yr clear Apr'12 London UK. Apr'13 mets recur to lymph btw left lung & aorta, 3x Cisplatin+5FUchemo+20 rad, was all clear but 6-mo PET-CT shows mets to pleura around left lung, participating in St 1 trial of GDC-0980. GDC lost effect and ended July'14, bad atrial fibrillation requiring hospitalisation, start more standard chemo 10 Sep 2014.
Sadly has passed away, notified Jan 2015.