You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag. The prescription must be in the employee's name.If not, the employee will be subject to disciplinary action up to and including discharge. All prescription medicines are allowed on airplanes, whether in a carry-on or checked bag. This handbook tells you about the Alameda County Transportation Commission. The only rules for a domestic flight will be the ones from TSA. States can't set their own. An aggressive marketing campaign fuels the desire to ease pain through prescription drugs.