 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  a class of drugs known as kinase inhibitors. It works by slowing or stopping the growth of cancer cells. How to use Zydelig See also Warning section. Read the Medication Guide provided by your pharmacist before you start taking idelalisib and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth with or without food as directed by your doctor, usually twice daily. Swallow the tablets whole. Do not chew or crush the tablets. The dosage is based on your medical condition and response to treatment. Do not increase your dose or use this drug more often or for longer than prescribed. Your condition will not improve any faster, and your risk of side effects will increase. Since this drug can be absorbed through the skin and lungs and may harm an unborn baby, women who are pregnant or who may become pregnant should not handle this medication or breathe the dust from the tablets.The side effects of Zydelig Oral: See also Warning section. Diarrhea, headache, heartburn, mouth/throat sores, and trouble sleeping may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. People using this medication may have serious </s>