A consulting pharmacist informed a patient about possible side effect of metronidazole that is normally provoked by alcohol intake. What is the mechanism of this phenomenon?

Answer options

1. Enzyme alcohol dehydrogenase blocking
2. Enzyme acetylcholinesterase blocking
3. Enzyme glucose 6-phosphate dehydrogenase activation
4. Enzyme acetylcholinesterase activation
5. Enzyme alcohol dehydrogenase activation