If you carry liquid medicine with you, you must attach a doctor's prescription or hospital certificate. The quantity you can carry with you is based on the needs of passengers on the plane, and the excess must be checked.

Canada and the United States: When you bring prescription drugs into the country, you must also bring the prescription, the original label of the drug and detailed instructions for use. You can take Chinese patent medicine with you to the United States, but Chinese herbal medicine can't be taken on the plane.

The US Customs and Border Protection (CBP) said that not all drugs produced abroad have been verified by the US Food and Drug Administration, so they should not be brought into the United States. If passengers need to take it, the drugs they carry are limited to travel. Besides, any Chinese medicine containing animal ingredients, such as Tiger Bone Wine, bear bile powder Bird's Nest, Niuhuang Jiedu Pill, etc. , are contraband. No matter what drugs passengers carry, they should declare to the customs, so don't take any chances.