Question what it is.

“What the hell is it?” You ask, not trusting this strange liquid.

The sergeant raises his hand, but before he can strike you the royal apothecary in a surprisingly calm and pleasant voice answers your question. “It is a very expensive elixir that is extremely hard to produce. It is not poisonous, but it gives those who drink it endurance and a regenerative ability that will heals wounds quickly. To be blunt, this potion will not make you escape any of the pain you are about to face, but will give you increased constitution to endure it and will guarantee your perfect beauty will not only be protected but increased. I strongly suggest you drink it.”