Another consequence was ceding the maritime territory east of the Ussuri River to Russia, which led to the founding of Vladivostok.
Also, Kowloon was ceded to Britain to be part of the Hong Kong crown colony.
As you can see from the article, the American attitude at the time was generally supportive of Britain. Another consequence of the war was the transportation of Chinese indentured servants to America in British ships.
The US got some trade concessions from China as a result of the Opium War.
This year also marks the centennial of our little-known war with Paraguay.