When a situation occurs in which one is so overwhelmed by an event that the the use of "drastic" must be combined with the word dramatic to accuratley decribe the situation.

When something happens dramatically and drastically. A drastic and dramatic change.

adv. In a both dramatic and drastic manner; theatrically; vividly, rapidly.

A more drastically dramatic event than a singular dramatic event or singular drastic measure.

A combination of dramatically and drastically. I almost used it for an article a few moments ago, completely without checking this site.

When you are at a loss for the difference between dramatically and drastically

A combination of "drastic" and "dramatic".