both company medicines are same, you can buy any one which is less costly side effects of sorafenib and call your doctor at once if you have: mouth sores; blood in your urine or stools, coughing up blood or vomit. heavy menstrual periods, easy bruising, unusual bleeding, or any bleeding that will not stop; pale skin, feeling light-headed, rapid heart rate, trouble concentrating; chest pain and severe dizziness, fainting, sweating, swelling, rapid weight gain, feeling short of breath (even with mild exertion); rash, blisters, oozing, or severe pain in the palms of your hands or the soles of your feet; upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); sudden weight loss, increased appetite, trouble sleeping, increased bowel movements, feeling hot, feeling nervous or anxious, swelling in your neck (goiter); dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, confusion, uneven heartbeats, seizure); or severe skin reaction -- fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.