The inclusion of vasoconstrictors, such as adrenaline or noradrenaline, in local anesthetic cartridges is a standard clinical practice in Spain during 2025 to prolong the duration of the numbing effect and reduce localized bleeding. By constricting the blood vessels in the area of the injection, these agents slow down the absorption of the anesthetic into the systemic circulation, which both increases its efficacy and reduces the risk of systemic toxicity. However, for the aging Spanish population with pre-existing cardiovascular conditions, clinicians must carefully manage the dose of vasoconstrictor to avoid potential heart rate or blood pressure spikes. The Spain Dental Anesthesia Sector notes that "plain" anesthetic solutions without adrenaline are frequently used for patients with high-risk cardiac profiles or those taking certain medications that could interact with stimulants.

Frequently Asked Questions

Q. Why do my heart palpitations sometimes increase after a dental injection? A. This is often due to the adrenaline in the anesthetic; it is usually a harmless, short-lived effect, but you should always inform your dentist of any heart issues.

Q. Are there anesthetics without adrenaline? A. Yes, "plain" versions of anesthetics like mepivacaine are available for patients who are sensitive to vasoconstrictors.