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Classification of Drugs Affecting Cerebral Circulation

For medical students2 min readUpdated 2026-10-10

Drugs affecting cerebral circulation are pharmacological agents that improve blood flow in the cerebral vessels. They are classified by their origin and mechanism of action, prominently including calcium channel blockers and plant alkaloid derivatives.

Calcium BlockersCinnarizine and nimodipine exhibit a pronounced tropism for cerebral blood vessels.
Ischemia ProtectionNimodipine is the drug of choice for preventing ischemic damage following hemorrhage.
Migraine TherapySumatriptan relieves pain by reducing excessive cerebral vessel pulsation.
Plant OriginVinpocetine and nicergoline are derived from periwinkle and ergot alkaloids.

General Principles of Classification

Pharmacological correction of cerebral blood flow is a critical task in neurology. Specialized medications are used for this purpose, categorized by two main criteria: mechanism of action and chemical origin. The primary distinguishing feature of this group is their ability to selectively target the cerebrovascular bed, effectively improving blood flow. Based on pharmacological analysis, they are divided into synthetic drugs (calcium antagonists) and agents derived from plant raw materials (alkaloids).

Calcium Channel Blockers (Calcium Antagonists)

Calcium channel blockers represent one of the most significant groups in this classification. Their therapeutic value is due to their pronounced tropism for cerebral vessels.

Plant Alkaloid Derivatives

A significant portion of drugs improving cerebral hemodynamics are of botanical origin. Pharmacology actively utilizes alkaloids from two plant sources that, after laboratory modification, became effective medications:

  1. Derivatives of periwinkle alkaloids (Vinca minor). Extracts from this plant served as the basis for semi-synthetic drugs. The main representative is vinpocetine, a semi-synthetic agent actively used to normalize cerebral circulation.
  2. Ergot alkaloid derivatives. This group has a unique pharmacological profile. A representative that improves cerebral circulation is nicergoline. Its most important characteristic is the presence of $\alpha$-adrenolytic activity. It is important to understand the distinction: unlike other ergot derivatives traditionally used as antimigraine drugs, nicergoline is used specifically for the systemic improvement of cerebral blood flow.

Specific Drugs: Pathogenetic Therapy of Migraine

Within the classification of agents affecting cerebral circulation, a special place is occupied by drugs with specific clinical effects aimed at treating particular conditions. A prime example is migraine therapy.

Clinical Application: Summary

Analysis of pharmacological characteristics shows that drug selection strictly depends on the clinical objective. For basic blood flow improvement, cinnarizine or vinpocetine are used. In acute conditions accompanied by vasospasm and the risk of ischemia (subarachnoid hemorrhage), nimodipine is essential. To abort specific throbbing migraine pain, a pathogenetic approach using sumatriptan is required. Thus, the classification reflects not only chemical origin but also the strict therapeutic orientation of each agent.

Mnemonic

For quick recall: VINpocetine — from the Latin name for periwinkle (Vinca minor). NIMOdipine — NEUTralizes MObile deficit in hemorrhages (NIMOlates brain deficits).

Frequently asked questions

What are the main groups in the pharmacological classification of agents improving cerebral circulation?

The pharmacological classification of agents improving cerebral circulation comprises five main groups of drugs:

  • Calcium channel blockers — nimodipine, cinnarizine.
  • Periwinkle alkaloid derivatives — vinpocetine.
  • GABA derivatives — nicotiroyl gamma-aminobutyric acid.
  • Ergot alkaloid derivatives — nicergoline.
  • Nicotinic acid derivatives — xanthinol nicotinate.
Which calcium channel blockers selectively improve cerebral circulation?

Calcium channel blockers that selectively improve cerebral circulation include cinnarizine and nimodipine.

  • Cinnarizine is a basic representative of the group with a pronounced tropism for cerebral vessels.
  • Nimodipine is a specific drug used to prevent ischemic damage and reduce neurological disorders resulting from vasospasm after subarachnoid hemorrhage.
What is the molecular mechanism of action of vinpocetine?

The molecular mechanism of vinpocetine involves the inhibition of the phosphodiesterase enzyme. This leads to the accumulation of cyclic adenosine monophosphate (cAMP) in vascular smooth muscle cells, causing relaxation of the vascular wall and providing a myotropic spasmolytic effect. As a result, preferential dilation of cerebral vessels occurs without inducing a 'steal' phenomenon.

What pharmacological effects and mechanisms of action does nicergoline possess?

Nicergoline has a combined mechanism of action including $\alpha$-adrenolytic and direct myotropic spasmolytic activity. Pharmacological effects of the drug:

  • Pronounced dilation of cerebral arterioles and peripheral vessels.
  • Improved hemodynamics in the cerebral, pulmonary, renal, and limb vascular beds.
  • Inhibition of platelet aggregation.
  • Nootropic action manifested by improved memory and attention.
  • Mild effect on systemic blood pressure.
What receptors does sumatriptan act upon as an agonist?

Sumatriptan is a selective serotonin $5-HT_1$ receptor agonist used to abort migraine attacks. Specifically, it acts as a selective agonist of central $5-HT_{1D}$ receptors located predominantly in cerebral vessels. Additionally, the drug stimulates presynaptic 5-HT receptors, suppressing the release of the pain mediator substance P.

Which drugs belong to the periwinkle alkaloid derivatives?

Vinpocetine belongs to the derivatives of periwinkle alkaloids (Vinca minor L., Vinca erecta).

  • Vinpocetine is a semi-synthetic derivative of the alkaloid vincamine. The drug selectively improves cerebral circulation, exerts a myotropic spasmolytic action via phosphodiesterase inhibition, and possesses proven neuroprotective and metabolic properties.
What is the pathogenetic mechanism of action of sumatriptan in aborting a migraine attack?

The pathogenetic mechanism of sumatriptan in aborting a migraine attack is dual in nature.

  • Vascular component — stimulation of central $5-HT_{1D}$ receptors causes cerebral vasoconstriction, reducing excessive pulsation and eliminating headache.
  • Neuronal component — stimulation of presynaptic 5-HT receptors inhibits the release of the pain mediator (substance P), reducing pain sensations.
Which drug is the agent of choice in subarachnoid hemorrhage?

Nimodipine is the agent of choice in this clinical situation. It is a calcium channel blocker that prevents vasospasm and effectively reduces the risk of ischemic damage, thereby minimizing neurological deficits.

What is the pharmacological feature of nicergoline?

Nicergoline is an ergot alkaloid derivative. Its key feature is pronounced $\alpha$-adrenolytic activity, which allows it to be used to improve cerebral circulation.

What is the mechanism of action of sumatriptan during a migraine attack?

Sumatriptan acts as a pathogenetic agent. It selectively reduces the excessive pulsation of cerebral vessels that occurs during an attack, thereby completely eliminating the headache.

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