Prescription

A woman walks into a pharmacy and asks the pharmacist for some arsenic. He asks "What for?" She says, "I want to kill my husband." He says "Sorry, I can't do that." She then reaches into her handbag a pulls out a photo of her husband in bed with the pharmacist's wife and hands it to him. He says, "You didn't tell me you had a prescription..."

Miss Manners

A woman walks up to an obnoxious drunk at a bar and tells him, "If you were my husband, I'd poison your drink." The man replies, "If you were my wife, I'd drink it."

Bathroom Drugs

A man was caught by a cop with drugs in the bathroom
The man says, "I swear, it's not mine! I found it here and tried to flush it down the toilet, but every time I flush the drugs down it magically reappears in my hand!" "I don't believe you," says the cop. "Show me." The man tosses the bag of drugs into the toilet, then flushes it. The bag swishes down. The cop then stares at the man's empty hand as the bag is flushed down. "Well," says the cop, "where are the drugs now?" "What drugs?"