Hanataro.

"I'd be happy to help you Ichigo! Now, just hold on while I get some things to help get your energy back. Wow, you're a little scraped up. First, let's get you in a bed so you can rest. You look like you're about to fall over!"
"I am." Hanataro helped Ichigo into a bed then he darted away to fetch some supplies.
Ichigo watched weakly as Hanataro took some things out of a cabinet and put them on a counter. Then he saw Hanataro take out a vial of green liquid. He poured a small amount a metal basin. Then the young medical shinigami gathered things precariously in his arms and made his way back to Ichigo.
Hanataro smiled widely as he approached Ichigo. All Ichigo could see, besides Hanataro's happiness for being able to treat him, was the green liquid that sloshed dangerously close to the bowl's edges. Hanataro said, "I'll get you cleaned up and better in no time Ichigo!" Then Ichigo watched as the young man came forward quickly, not quite looking where he was going. The next thing Ichigo saw was the green liquid from the bowl sailing toward him in a large arc. Even though Ichigo tried to avoid it, it splashed across his thigh, soaking his clothes and instantly sinking in to them.
"What the hell is that stuff Hanataro? My leg's all tingly!"
"Oh, it's nothing. NOTHING, Ichigo!" To himself, he muttered, "Oh, uhm, well, I've probably only got a few seconds because his spiritual energy has been weakened from being in Kurotsuchi's lab..."
"What are you saying?" Ichigo said, as he felt his leg go from tingly, to completely numb.
"Nothing! Just lie back and relax, while I can see if I can find Isane..."
"What do you need Isane for? And wait a minute, why do I feel so tired?" Ichigo lay back in the bed while the room started to slowly spin.
"Just stay there. Well, you won't really have much of a choice now, but I'll be right back. I have to find Isane so she can help me counteract the effects of the Shinten."
Ichigo felt himself floating, not literally, but inside his head. On top of that, he felt that he was quickly losing consciousness. He slurred, "Shhhhinteeeeennnn? Wasssssthaaaaa?"
"Nothing you need to worry about," Hanataro answered, then he turned his head back and yelled, "ISANE!" He turned back to Ichigo.
Ichigo fought against the effects of the green liquid that invaded his body and rendered him helpless. Little did he know that the Shinten Hanataro had accidentally splahsed on him was an extremely powerful anesthetic and was only supposed to be used a single drop at a time, not a large splash all at once. The last thing Ichigo saw was Isane standing next to Hanataro as the young man frantically explained about how he'd accidentally splashed a large amount of Shinten on Ichigo's leg. All he heard Isane say was, "That's enough to knock him out for a week! We'd better get him cleaned up and call in Captain Unohana to see if she can extract any of the medicine from him. Still, I think he may be out for a few days at least."
"Sorry Ichigo," Hanataro said as Ichigo slipped into a deep black sleep.
A/N: Accidents DO happen, but because of them, your story is over right here! Go back and try a few other things and see if you can have a different ending!