Fours days've gone by since he stopped taking the meds. On the second day he scraped his finger and watched, disappointed, as it bled sluggishly down the side of his hand; on the third day he tried to make his foot invisible, and only succeeded in straining his eyes (and, somehow, pulling a muscle in his toe).
It's a good thing Peter hasn't met Niki yet, because if he had, the door handle would be pulp. Luckily, his strength is all his own, and the only damage is to his whitening knuckles.