A lidocaine patch manages localized pain through topical application. This medicated patch delivers a pain-relieving substance directly to the affected area, offering a non-opioid option for discomfort.
How Lidocaine Patches Work
Lidocaine, the active ingredient in these patches, functions as a local anesthetic. It works by temporarily blocking nerve signals that transmit pain sensations to the brain. This action occurs at the site of application, numbing the specific area of discomfort.
The mechanism involves lidocaine interfering with the flow of sodium ions into nerve cells. Specifically, it binds to voltage-gated sodium channels located on the nerve membranes, preventing them from opening. This blockade stabilizes the nerve cell membrane, inhibiting the initiation and conduction of nerve impulses.
Because lidocaine acts locally and remains primarily at the skin’s surface, only minimal amounts are absorbed into the bloodstream. This localized action provides pain relief directly where it is needed without causing widespread systemic effects.
Proper Application and Usage
Applying a lidocaine patch correctly is important for its effectiveness and safety, especially when targeting shoulder pain. Begin by ensuring the skin on and around the shoulder area is clean, dry, and free from any lotions, oils, or broken skin. This preparation allows the patch to adhere properly and ensures optimal delivery of the medication.
Carefully remove the protective backing from the patch, being careful not to touch the adhesive side. Position the patch directly over the area of greatest pain on the shoulder. Press down firmly on the patch with your hand for about 10 to 20 seconds to ensure good contact with the skin, especially around the edges.
Lidocaine patches are typically worn for a specific duration, such as 12 hours on and then 12 hours off, to prevent tolerance and minimize potential side effects. It is important to follow the manufacturer’s specific instructions regarding the maximum number of patches that can be worn at one time, which is generally up to three patches. Always dispose of used patches safely, folding the adhesive sides together to prevent accidental exposure.
Addressing Shoulder Pain
Lidocaine patches are often used to manage various forms of localized shoulder pain. They can be beneficial for muscle pain, such as strains or soreness resulting from overuse or minor injuries. The localized numbing effect helps to reduce the discomfort associated with these conditions.
The patches also offer relief for certain types of nerve pain affecting the shoulder. For instance, they may be considered for post-herpetic neuralgia, a persistent nerve pain that can occur after a shingles outbreak and sometimes affects the shoulder area. The topical application directly targets the affected nerves.
While lidocaine patches provide temporary, localized relief, they do not cure the underlying cause of shoulder pain. They serve as a tool for managing symptoms, making daily activities more comfortable. This localized approach is particularly useful for chronic pain conditions or acute flare-ups where targeted symptom control is desired.
Safety Considerations and Warnings
Using lidocaine patches requires an understanding of potential side effects and important safety warnings. The most common side effects occur at the application site and include skin irritation, redness, itching, or a rash. These reactions are usually mild and temporary, resolving after the patch is removed.
While rare, signs of systemic absorption of lidocaine can occur, indicating that too much medication has entered the bloodstream. These signs may include dizziness, lightheadedness, drowsiness, or an irregular heartbeat. Should any of these symptoms arise, it is important to remove the patch immediately and seek medical attention.
Lidocaine patches may be unsuitable for individuals with certain medical conditions or allergies, such as a known allergy to lidocaine or other local anesthetics. People with severe liver disease or certain heart conditions should use lidocaine patches with caution or only under medical supervision, as these conditions can affect how the body processes the medication. Always store and dispose of patches safely, out of reach of children and pets, to prevent accidental ingestion.