The rumbling in Tiffany's stomach grew worse and she put the drink down and sat down a moment to wait for the feeling to pass, "Or maybe you shouldn't try it. It's doing a number on my stomach."
Tiffany shivered as a strange sensation spread throughout her body. Could the drink have gone bad or something? Maybe there was something in it that she was allergic to. She reached for the can to see what the ingredients were, but stopped at the sight of her arm. The hairs on it were thicker, maybe longer and darker as well.
Things like that didn't happen though. She was quick to dismiss it as a trick of the light or something like that when she felt her shirt start to get tighter.
"Katie," she stammered, "I think the drink did something to me."
Even her voice sounded different, though she couldn't tell exactly what was wrong with it.
"Tiff! Your face!" Katie let out a little squeal of fright.
Tiffany brought her hands to her face and was shocked by what she felt. For lack of a better way of putting it, she could feel her face getting wider. Higher up she could feel the development of a protruding brow ridge as well as that her eyebrows were becoming thicker, to the point where they were practically a uni-brow. Her once luxurious light brown hair lost some of its luster as the strands became thicker and fell flat and straight.
She let out a groan as she felt her shirt getting tighter as her torso rapidly bulked up. The sleeves of her shirt ripped along the sides as her arms became thicker and more muscular. The rest of her shirt quickly followed suit, tearing away from her more robust frame. Without her shirt she could see that her body hair had become longer and thicker, spreading over most of her body so that there was even a light dusting over her ample breasts.
She had become a Neanderthal woman...