. No it won’t effect the treatment which brand your are using . Your can discuss with your oncologist Rega this , if your wish to do so .The drug is worth taking ,according to studies it have shown it’s efficacy in both the most common types of RCCs . It will be helpful if you can provide your full treatment history and all reports ,which can help me give my opinion regarding how effective the drug will be in your case . Also , I may need more details regarding your current treatment location, to discuss regarding availability of any alternative drug to you locally. The usual side effect profile includes- Depigmentation of the hair or skin,skin rashes, gastro intestinal symptoms , more serious side effects are seen in some patients, which need to be constantly monitored.