Let's take a minute to talk about your medication. This is Keytruda. It helps to treat certain types of cancer. Keytruda is not chemotherapy. Instead, it is called "targeted therapy". It works WITH your immune system. You will receive this medicine as an infusion into a vein. Doses take about 30 minutes, and they are often given every THREE weeks. Sometimes, an infusion reaction can happen during the dose or in the first 24 hours after. Your doctor or nurse will watch you closely during each dose and tell you which symptoms to report. He or she will be prepared to treat any concerns. Many people will have side effects. Common side effects with Keytruda include feeling tired, or having nausea, a decreased appetite, muscle pains, and either diarrhea or constipation. Others include a rash, itching, a cough, or shortness of breath. You should tell your doctor right away if you have these or other side effects, to make sure they are not a sign of a more serious condition. As with any medicine, rare but serious side effects could occur. With Keytruda, there is a chance that your immune system could attack your normal organs and tissues. It is important to read the medication guide to know which symptoms to watch for and when to report changes. To help keep this medicine safe for you, your doctor will follow your condition closely and may order blood tests. You should always check with your doctor or pharmacist before taking other medicines. Keytruda can harm unborn babies. Women must talk to their doctors about which birth control methods to use and for how long. Women should not breastfeed. For best results with Keytruda, work closely with your healthcare team to understand possible side effects and how to report them.