Richard Finn, MD: Sorafenib does have some toxicities that we’re very familiar with. Most commonly, it can cause a hand-foot skin reaction as well as GI problems. Most concerning would be diarrhea of various severities and also, because it hits the VEGF access, hypertension, especially in a patient who has preexisting hypertension.
This patient has advanced liver cancer, and we had discussed that the treatment options are really going to be sorafenib or consideration for a clinical research study. This patient has a history of some noncompliance with her medications and, therefore, is not felt to be a good candidate for a clinical study. She is started on a standard of care, sorafenib at 400 mg/twice a day orally.
When starting patients on sorafenibeven though it’s an oral drug, it is still an anti-cancer drug—we need to watch our patients closely in order to mitigate side effects. I think it’s important that patients be seen within 2 weeks of starting their medication. That allows us to intervene early for side effects. It’s also good to counsel patients beforehand. To prepare for GI toxicity, they should have Imodium on hand. For skin toxicity, advise them to avoid repetitive trauma to their hands and feet and to wear comfortable shoes. Often, emollients and urea-based creams can be helpful, such as Utterly Smooth.
So, this patient comes back for her follow-up. At this time, her blood pressure is a little higher than at baseline. She is fatigued and reports having several loose stools a day. At this point, if we consider this grade 3 diarrheadiarrhea that is frequent, interfering with her ADLs, or activities of daily living—she needs some intervention. I think it’s very reasonable to hold her drug for a short period of time, start her on Imodium if she is not being compliant with that, and have her come back within a few days to make sure she is doing better, or at least be in touch with her over the phone.
Once things have cooled down, the question will become, do we resume the same dose or dose reduce her? I think with a first episode that is uncomplicated, meaning she doesn’t require an admission or IV fluids, it is not unreasonable to try her back at the full dose and advise her to be proactive with antidiarrheal agents. If she is not able to be compliant with that or she starts back on her full dose and has a recurrent episode of significant diarrhea despite Imodium, then I think we need a dose reduction.
So, in the setting of this patient, the patient does go back on 400 mg/twice a day with education on how to manage her Imodium, to take it daily and frequently as needed for her loose stool. But despite that, she has another episode of severe, frequent diarrhea, and, therefore, she is dose-reduced. At 400 mg/once a day, she’s doing better. Typically, in managing patients on sorafenib, we image them on a regular basis, probably somewhere in the range of 2 to 3 months like many other malignancies. As we know, sorafenib does not typically cause tumor shrinkage or a resist type of response, but it often has been shown to have disease stabilization. Sometimes, we see a decrease in enhancement of the tumor, but this is a cytostatic drug that has been shown to improve progression-free survival and overall survival without shrinking tumors.
Transcript edited for clarity.