Two Aucklanders accidentally consumed methamphetamine after making casseroles in a slow cooker that was contaminated with the drug.
The two adults went to Middlemore Hospital with symptoms of nausea, heart palpitations, dizziness, swollen tongues and facial flushing after eating a homemade bean casserole.
The two went to hospital on other occasions after eating the same bean casserole and a beef casserole all made in the slow cooker.
Samples of the left-over casseroles were taken away by Auckland Regional Public Health Service to try to determine what caused their symptoms.
The samples failed to show any evidence of poisoning, and were screened for drugs or medicines.