A Vasoprotective is a medication which acts to alleviate certain conditions of the blood vessel

Blood vessel

The blood vessels are the part of the circulatory system that transports blood throughout the body. There are three major types of blood vessels: the arteries, which carry the blood away from the heart; the capillaries, which enable the actual exchange of water and chemicals between the blood and...

s. For example, the World Health Organization

World Health Organization

The World Health Organization is a specialized agency of the United Nations that acts as a coordinating authority on international public health. Established on 7 April 1948, with headquarters in Geneva, Switzerland, the agency inherited the mandate and resources of its predecessor, the Health...

 used the term to describe agents used in the treatment of hemorrhoid

Hemorrhoid

Hemorrhoids or haemorrhoids , are vascular structures in the anal canal which help with stool control. They become pathological or piles when swollen or inflamed. In their physiological state they act as a cushion composed of arterio-venous channels and connective tissue that aid the passage of...

s and varicose veins.

Hormones such as estrogen

Estrogen

Estrogens , oestrogens , or œstrogens, are a group of compounds named for their importance in the estrous cycle of humans and other animals. They are the primary female sex hormones. Natural estrogens are steroid hormones, while some synthetic ones are non-steroidal...

 can have a vasoprotective effect.

Another vasoprotective is valsartan

Valsartan

Valsartan is an angiotensin II receptor antagonist , with particularly high affinity for the type I angiotensin receptor. By blocking the action of angiotensin, valsartan dilates blood vessels and reduces blood pressure...

.
More specifically, arterial vasoprotectors are called angioprotectors.