He was prescribed antidepressants by his doctor.

The internal anal sphincter is a muscle that helps us control defecation.

The anal sphincter is an important part of the body.

I am taking antihistamines for my allergies.

He was like a double-dealer, expressing different opinions to two groups.

Luxembourg is a grand duchy in Europe.

He is from a grand duchy.

Kinda, I want to do something more fun.

What is the common difference of this sequence?

Their opinions often intersect.