[Oh. Being poisoned would make sense. Maybe that's why he's still feeling so out of it and lethargic.]

Mmm-maybe you did, but... You don't need to apologize or anything. This is how battling goes. Sometimes you get poisoned or paralyzed or end up asleep.

[He shrugs one shoulder, feeling bad now that she seems rather distressed over his current condition.]

I don't think there's anything you need to learn to control, really. Poisoning is a good battle technique, it slowly saps your opponent's energy.