You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag. You can bring your medication in pill or solid form in unlimited amounts as long as it is screened.Network Health covers outofstate, innetwork pharmacies. Prescription laws, however, regarding what is allowed, may differ as you go from state to state. All prescription medicines are allowed on airplanes, whether in a carry-on or checked bag. How do I bring my prescription medicine into the United States? Narcotics and dangerous drugs are prohibited entry. A traveler requiring medicines containing habit-forming drugs or narcotics (e.g. The TSA does make allowances for "medically necessary" medication. Find what you need to know about traveling with medicine and any necessary medical equipment, including using them during your flight. Medication.