Early/mild features:
Anorexia
Muscle cramps
Paresthesias
Irritability
Advanced/severe<unk> 
See beriberi
See Wernicke-Korsakoff syndrome
Anorexia
Muscle cramps
Paresthesias
Irritability
See beriberi
See Wernicke-Korsakoff syndrome
Thiamine deficiency
Ethanol toxicity
Selenium toxicity
Alcohol use disorder
Gamma hydroxybutyrate toxicity
Alcohol withdrawal
Vitamin A toxicity
Alcohol withdrawal seizures