While there are some reasons why an ultra duration numbing in Canada is better for your upcoming procedure, there are some common reasons why you should avoid benzocaine. Benzocaine causes contact dermatitis, and Lidocaine is a stronger numbing agent. The difference between these two substances makes it important to understand what each does not do for your skin. Read here why ultra-duration numbing is more effective than benzocaine.
1: Lidocaine ultra-duration numbing skin creams work faster and are safer than older lidocaine formulations. These topical anesthetics are absorbed after exposure to mucus membranes. The amount of Lidocaine absorbed depends on the site, duration of exposure, and total dose. A lidocaine cream should be applied at least an hour before a cosmetic procedure. The cream should be applied thickly to the area to be treated and rubbed into the skin. The application of a second layer is recommended to reduce the pain further.
2: Benzocaine is an anesthetic that blocks nerve conduction. It reduces the permeability of nerve membranes to sodium, increases the threshold for electrical excitability, and inhibits the release of action channel proteins. This ingredient affects all nerve fibers, including sensory, motor, and autonomic. It reduces the sensation of pain and other physical effects such as swelling of the face and tongue. It is also metabolized by the liver and can lead to other side effects.
3: Benzocaine is a widely used topical anesthetic linked to an increased risk of contact dermatitis. The drug is a class I local anesthetic that can cause both immediate and delayed hypersensitivity reactions. In addition to topical use, benzocaine can cause allergic contact dermatitis when absorbed through the skin. If you suspect contact dermatitis due to this medication, you should consider skin testing.
4: The absorption of Lidocaine is affected by various factors, including the site of application, the amount of drug absorbed from the mucous membranes, and the rate of metabolism and excretion. In addition, Lidocaine is poorly absorbed from the intact skin. Its absorption from the upper respiratory tract is particularly fast, and only 35% is bioavailable when administered orally. Its absorption rate is also affected by tissue binding capacity and vascularity.