The Poisoned slice of toast

It was an ordinary day until I sat down to eat my morning slice of nutella on toast. Immediately following my first bite a weird sensation filled my mouth. It felt like my whole mouth was on fire but it made my tongue tingle at the same time. How weird I thought, but the incident was soon forgotten when the postman knocked. It was later on in the day when the second side affect struck me. At 2:00 diziness came over me like a hurricane. It suddenly struck me that maybe my cup of tea had been poisoned?.....