True Love in a Drink: Romance Bio-Thriller

She didn't see the skanky guy slip a dose of Love into her drink. She picked it up and sipped it, looking appraisingly at the blind date her friend had set her up with. The skanky guy coughed loudly and jostled her, but the blind date started choking on a bar peanut at exactly the same time, so she was busy thinking about how awful it would be if he died on her. She didn't even really notice the jostling; the bar was a pretty crowded place that night. She'd been jostled unintentionally more than once. So instead of turning around and facing him, she touched the shoulder of her date. "Are you okay?" she asked. He was still choking, so she thwapped him across his shoulder-blades. He spat--

Inspiration: The "Love and Kisses" postage stamps I got today!
Story Potential: High.
Notes: Unwanted true love that becomes wanted, drugs, danger, romance.... Could be novel-length. I'm actually kind of disturbed that this is high potential, but it is--for a romance bio-thriller, the sort of science fiction that nobody thinks of as science fiction anymore. Because, y'know, science fiction means spaceships.