Ever heard of conditional acceptance?
Accept their offer on the condition that the one administering the drug signs full damages acceptance and payment set the damages to $1B. Also that the patent rights for any substance being injected into you be transferred to you before injection.
You are not saying no, you are accepting their offer with conditions they can either accept or reject. If they reject you win, they can't proceed in injecting you.
*NOT A PAID LAWFAG.