Suicide with cyanides is relatively rare but highly lethal. The lethal oral dose of cyanide salts is 200 mg, and concentrations >3 mg/L may be potentially lethal. The symptoms of poisoning are predominating in the central nervous system and cardiovascular system. We report the case of a 43-year-old goldsmith man who presented with self-poisoning by cyanide salt ingestion. Patient's symptoms included confusion, cardiac arrhythmias, hyperkalemia, leukocytosis, metabolic acidosis with high anion gap, hypotension, and then hypertension. The cause of the patients poisoning was not initially diagnosed. Intensive supportive treatment was performed. The patient died on the 3^rd day of admission following cardiac arrest. At autopsy, hemorrhagic gastritis and cherry-red discoloration of the chest muscles were observed. Forensic toxicology showed cyanide in the blood and tissues. Cyanide poisoning could appear in different forms, and like our case, the symptoms can last for several days with nonspecific symptoms.

Poisoning with any of the colchicine or chloroquine drugs is rare. These drugs exert therapeutic and toxic effects on tissues by different mechanisms. Colchicine is used to treat a number of rheumatologic diseases and heart problems. In addition, chloroquine is used to treat malaria and some inflammatory diseases. There is a small gap between the therapeutic and toxic doses of these drugs. Gastrointestinal symptoms are the initial causes of poisoning with these drugs and then widespread organ failure in later stages can lead to sudden cardiac death. We introduce a case of concurrent poisoning with both drugs, in which the patient presented with a headache, nausea, and vomiting several hours after suicide. On the 1^st day, the patient's status was stable, but on the 2^nd day, the patient suddenly becomes ill and died even though the patient received supportive therapy. Concurrent poisoning with chloroquine and colchicine is extremely lethal, and early aggressive management is recommended even in an apparently stable patient.

Prolactinomas are the most common type of functional pituitary tumors. Dopamine agonists is the most important drugs used in prolactinoma,have antagonistic effect with antipsychotic drugs used in schizophrenia. Conversely, dopamine antagonist drugs increase prolactin in patients with simultaneous schizophrenia. In the present case, we report a 29-year-old single male with schizophrenia who treated for 8 years with risperidone and presented with macroprolactinoma. Iatrogenic hyperprolactinemia is a well-known side effect of dopamine antagonist drugs for treatment in a patient with schizophrenia. On the other hand, it appears these drugs have the other side effects, such as drug- induced prolactinoma or boost growth.

Gastroenteritis is common among children and is usually caused by bacterial, viral, or parasitic gastrointestinal infections. The occurrence of gastroenteritis as the only symptom of coronavirus disease 2019 (COVID-19) is an uncommon condition. We present a 16-month-old girl that has recently been admitted to our hospital with vomiting, diarrhea, and lethargy, who was ultimately diagnosed with COVID-19. This case shows that the clinical manifestations of COVID-19 can be misleading in children.