You can bring your medication in pill or solid form in unlimited amounts as long as it is screened. You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag.All prescription medicines are allowed on airplanes, whether in a carry-on or checked bag. You can't legally bring it on the plane, regardless of the state laws you're flying from or to. You can travel with prescription drugs or medication in both carryon and checked baggage. While you're allowed to bring your prescription medications with you on a flight, it's important to have some sort of documentation with you. Many common U.S. medications and supplements are illegal abroad or require government authorization before your arrival. How to fly with medicine, including how to pack it effectively and the TSA rules you need to know. Find what you need to know about traveling with medicine and any necessary medical equipment, including using them during your flight. Medication. The TSA does make allowances for "medically necessary" medication.