This drug acts like Novocaine at the dentist's office to numb the cervix and surrounding tissue. You may feel a pinch or sting for a few seconds until the drug takes effect. A minute or two later you may experience a funny taste in your mouth, ringing in your ears, and numbness of the lips, fingers and toes. These are normal side effects and will pass quickly. During the dilation process you may experience fairly strong cramping.
Every woman reacts to discomfort differently.
We do know that being able to relax will help any cramping. Try to relax your legs, let them go limp in the stirrups. This will automatically loosen the abdomen and reduce cramping. Your doctor or assistant will help you get into a rhythm with your breathing. Take a deep breath, hold it, and exhale letting your whole body relax.