Regular exercise is an effective way to improve your overall health.

His suggestion was, effectively, an order.

How can I do this task most effectively?

The effectiveness of this new treatment is still being studied.

The medication had a positive effect on her health.

The new policy will come into effect next month.

He made a statement to that effect.

He made a statement to the effect that he would not be attending the meeting.

These drugs can sometimes effect miraculous cures.

The decision had a ripple effect throughout the company, causing changes in various departments.

The medication may have some side effects.