There is a rise in the use and abuse of nitrous oxide (N₂O) as a recreational drug. In spite of the laws enforced internationally, it remains readily available and is an inexpensive mode of recreational drug. Commonly known as the ‘laughing gas’, its use as a euphoric agent is on the rise. Subsequently, the side effects are also coming to light, associated with medical, financial and social implications. It is not detected in routine drug testing. The key differential in an acute setting is often confused with the query for Guillain-Barré syndrome, chronic inflammatory demyelinating polyneuropathy and malabsorption syndromes associated with vitamin B12 and folate deficiencies. This is a case report of a 21-year-old male who presented to the hospital with concerns for weakness and tingling sensations in his extremities accompanied by an inability to bear weight, which he suggested to seem to be worsening over a period of three weeks. His blood tests suggest mild deficiencies of vitamin B12 and folate levels, and MRI revealed subacute combined degeneration of the cervical cord from C2 to C6. The radiologist advised to rule out B12 deficiency and the use of nitrous oxide as a recreational drug. This led to the discussion with the patient, during which he admitted to the use of nitrous oxide. Prompt management with B12 injections intramuscularly every two to three days a week for 11 days followed by folate supplements and monthly B12 injections were advised. He was also reviewed by the physiotherapy teams, and the patient agreed to not use nitrous oxide in the future as a recreational drug.

During the height of the COVID-19 pandemic, there was great relief with the global mass rollout of the Covid-19 vaccination programs. While they have proven to be safe and effective, the gradual emergence of side effects to the vaccines has undermined public trust in the vaccination program and, whilst rare, can lead to significant morbidity and mortality. The most serious was the emergence of vaccine-induced immune thrombocytopenia and thrombosis (VITT), also known as thrombosis with thrombocytopenia syndrome (TTS) or vaccine-induced prothrombotic immune thrombocytopenia (VIPIT). VITT is a serious and often fatal complication of some COVID vaccines that seem more prevalent in younger people and women. We present a case of a 48-year-old woman who presented with VITT following COVID vaccination.

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Often, the provisional diagnosis for an elderly patient who arrives at the hospital with confusion is presumed to be delirium stemming from confusion usually caused by an infectious cause. The famous mnemonic PINCH ME signifies the ruling out of pain, infection (that usually has a urinary cause), constipation, dehydration, medication (particularly narcotics), and the environment (factors triggering confusion in a patient with a background of dementia). However, we report a rare case of sudden confusion in an elderly male with no previous history of cognitive impairment. This is the first ever reported case to the best of our knowledge of a patient that presented with sudden confusion, impaired extraocular mobility, and spontaneous cranial hemorrhage that was ultimately determined to be due to a hypothalamic and/or a pituitary cause. It signifies a need for prompt evaluation to arrive at an early diagnosis. Additionally, we hope this case report would serve as a guide to look beyond the current mnemonic of PINCH ME and instead to a new mnemonic of 'PINCH ME HOT' where the latter most mnemonic connotes the need to look at a hypothalamic/pituitary, ocular, or traumatic origin for the delirium.

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