@meghansa65 My husband has Hurthle Cell thyroid cancer that has metastasized to the lungs, the areas of the internal carotid artery and brain stem, as well as rib bones. It was discovered in 2005, and since then, he has had multiple surgeries and rounds of radiation in these areas. Last year, the mass by the carotid was beginning to squeeze it, but they figured another round of radiation in that area would disintegrate essential structures, so he started Lenvatinib. He/we were prepared for the worst symptoms, but he's been able to tolerate taking it, never skipping a day, for 15 months so far. Nausea has been a constant side effect since he started. Other side effects have come and gone fairly quickly. He always says, "It's better than the alternative".
I hope you have a bearable experience taking the drug as he has. Wishing you well.