Hereditary Angioedema (HAE) is not actually a disease easily treatable by prescription pills, but instead by very expensive injections.
Early in the episode, the team theorizes that a patient may have been infected with salmonella by smoking marijuana. Bacteria cannot be transmitted via smoke.
Chase laments cutting Jeremy open from neck to pubic bone. In Jeremy's last scene there is no sign of an incision.
When Tritter pulls House over he claims that House's pupils are dilated and begins a search. Opiates such as House's Vicodin cause pupils to constrict.