How much can you buy in Vancouver BC and bring into Washington of Tylenol plus Codeine?

In Washington state, you can bring in a limited quantity of Tylenol with codeine (which is a prescription medication) from Canada, but it's essential to have a valid prescription. Generally, travelers are allowed to bring a personal use supply, which is typically considered to be a 90-day supply, but regulations can vary. It's best to check with customs or a healthcare professional for the most current guidelines before traveling.