A joke

This is a translation of an Italian joke.
★A woman enters in a pharmacy and ask for a little arsenic.
The pharmacist: "Why do you need it, madam?"
The woman: "I want my husband to take drinks it"
"It's a poison, I can't give it to you."
The woman shows him a photo to him. There is her husband lying in a bed with the pharmacist's wife.
The man: "Oh, madam, you didn't tell me you had the  script / prescription recipe".

A Joke

This is a translation (traslation) of an Italian joke.
★A woman enters (in) a pharmacy and asks for a little arsenic.
The pharmacist: "Why do you need it, madame?"
The woman: "I want my husband to drink (drinks) it"
"It's a poison, I can't give it to you."
The woman shows a photo to him. There is her husband lying in a bed with the pharmacist's wife.
The man: "Oh, madame, you didn't tell me you had the recipe".

Haha... very amusing. Your translation was good!