Gefitinib Oral and Tasimelteon

• Generic Name: gefitinib
• Dosage Forms: n.a.
• Other Brand Names: Iressa

Gefitinib is used to treat metastatic (cancer that has already spread) non-small cell lung cancer in patients who have certain types of abnormal epidermal growth factor (EGFR) genes, and did not receive cancer medicines in the past. Your doctor will perform a test before you take gefitinib.

Gefitinib belongs to the group of medicines called antineoplastics (cancer medicines). It works by interfering with the growth of cancer cells, which are eventually destroyed.

Gefitinib is available only with your doctor's prescription.

• Generic Name: tasimelteon
• Dosage Forms: n.a.
• Other Brand Names: Hetlioz

Tasimelteon is a sedative, also called a hypnotic. It works by affecting certain substances in your body that help regulate your "sleep-wake cycle."

Tasimelteon is used to treat non-24-hour sleep-wake disorder.

Tasimelteon may also be used for purposes not listed in this medication guide.