Hi my husband was diagnosed with stage 4 nsclc with alk in Dec 2014. He's been stable on pemetrexed since and has just completed his 55th dose. He's struggling with his mouth (tongue swelling and weird taste carpet tongue etc) he's tried all the mouthwashes. Can only tolerate to drink small amounts of bottled water and not eating much! This lasts around a week of the cycle. He's reluctant to discontinue treatment while the cancer remains stable so just wondering if anybody knows of any other meds to help with the sore mouth please? All advice greatly received.