The very idea that he had done something under the influence of another substance made his stomach lurch. He had his reasons for this. One didn't go through his experience of being cursed for so long, controlled for so long, with the desire to let something else control him. He was even weary of potions offered to him and was considerably paranoid about what the Healers prescribed for his... his disability.
Astrophel stared hard at his water.
"I don't drink anything but water," he admitted slowly. He tilted his head. "I think I might've hit her or something. She's skittish like.. like an abused dog."