Spectrum of toxicity due to pheniramine overuse in a COVID-19 patient. How much do we know?

Pheniramine maleate is an easily accessible, potent antihistaminic compound used for the treatment of various allergic conditions. It acts on histamine one (H1) receptors on the central nervous system (CNS) and the peripheral tissues. It is a safe drug in therapeutic doses. However, overdoses as in suicidal cases, can result in serious, life-threatening drug-toxicity. These include atropine-like antimuscarinic effects like dryness of mucosal membranes, blurring of vision, hallucinations, CNS excitation such as irritability, insomnia, and seizures. Rhabdomyolysis can also occur as a result of its direct toxic effect on muscles, resulting in myoglobinuria, renal failure and electrolyte imbalance. Cardiotoxicity though rare, is also reported. We report a case of pheniramine maleate induced ventricular tachycardia, myoglobinuria with acute kidney injury (AKI) in a 20-year-old man who had consumed 50 tablets. He was incidentally also found to have SARS-CoV2 infection. However, timely intervention and aggressive supportive therapy helped in the recovery of the patient.

Case Report of a Saga of Post-COVID-19 Complications.

Coronavirus disease 2019 (COVID--19), caused by severe acute respiratory syndrome coronavirus 2, is characterized by symptoms such as fever, sore throat, cough, fatigue, myalgias, headache, diarrhea, and dysgeusia. In a majority of the cases, it causes mild illness. However, in severe cases, the virus activates the immune system causing systemic inflammation, immune dysregulation, and pro-thrombotic state leading to various complications. Among hospitalized patients with COVID-19, pneumonia, sepsis, and respiratory failure are frequent complications. However, even in the second year of the COVID-19 pandemic, our knowledge of its myriad clinical features and complications is still incomplete and continues to evolve. Here, we present the case of a patient who developed several complications post-COVID-19 one after the other. He was admitted with severe COVID-19 for which he received standard COVID-19 treatment and mechanical ventilation. In the post-COVID-19 state extending up to six months, he serially developed deep vein thrombosis, endogenous endophthalmitis, empyema, and post-inflammatory arthritis of the hip joints. To our knowledge, such a case has not been reported earlier in the literature.