Tykerb can cause some side effects that are usually not severe and can be treated successfully. The most common side effects are:
Dosages can be adjusted to help ease these side effects. In severe cases of diarrhea, it may be necessary to stop taking the medication.
When Tykerb is given with Femara, you also may have aromatase inhibitor side effects. Common side effects of Femara are bone thinning and bone and joint pain.
Very rarely, Tykerb has been found to cause mild heart damage. If heart damage occurs, Tykerb is discontinued and heart-strengthening medication can bring heart function back to normal. Anyone who is considering taking Tykerb and has a preexisting heart condition should be monitored carefully before and during treatment.
Tykerb does not seem to cause the more severe heart and lung problems associated with Herceptin.