Has anyone used E-Cig or vaping after treatment? We are wondering if this is safe after radiation? Though my husband is not a smoker, we have been told the vapor using propylene glycol, flavoring and vitamin E & C, helps with voice and swallowing problems. Any one have any research or experience with this? My husband is 3 1/2 months post treatment and is having problems with his voice, soft palate, and swallowing problems. He is a singer, and is trying to get his singing voice back before his concerts begin in December. He is still relying on PEG tube for 50% of his nutrition.