Barbiturates are commonly used for A: anxiety B: convulsion C: epilepsy D: anesthesia

Over-dose of barbiturates might cause A: coma B: respiratory depression C: hypotension D: shock

Taking barbiturates appears in a "hangover" phenomenon, called A: Aftermath B: Rebound phenomenon C: specific heterogeneous reaction D: Allergic reactions

Taking barbiturates appears in a "hangover" phenomenon, called A: After effect B: Rebound phenomenon C: Allergic reactions D: side effects

After taking barbiturates, the second morning, the patient feels hangover. This belongs to: A: Residual effect B: Side reaction C: Toxic reaction D: Allergic reaction E: Secondary reaction