Let's take a minute to talk about your medication. This is Tykerb. You should take it as directed by your doctor at the same time each day. You should take it at least 1 hour before or one hour after a meal. Tykerb helps treat certain types of breast cancer. Many patients will have side effects. You could feel tired. So, wait until you know how it affects you before doing activities that require you to be alert, like driving. You could also have an upset stomach or diarrhea. You might notice changes to your hands, feet, skin or hair. Your doctor can advise you how to prevent or manage many of these. The good news is most side effects are not serious. But, you should still report them to your doctor promptly. As with any medicine, more serious side effects can occur. These include problems with your heart, lungs, liver, or even severe diarrhea. You should pay close attention to your body, and call your doctor right away if you notice any unusual changes. To keep this medicine safe for you, your doctor will order lab work and monitor you closely. It's important to talk to your doctor or pharmacist before taking any herbal remedies or other medicines, even if they don't require a prescription. You should avoid eating grapefruit or drinking grapefruit juice. Women should not become pregnant or breastfeed while taking this medicine, because it can be unsafe for the baby. For best results, take Tykerb exactly as prescribed, and read the patient information leaflet for full information.