From the FDA Drug Label
The FDA drug label does not answer the question.
From the Research
The prescription for a lidocaine patch 4% should be written as "Lidocaine patch 4%, apply one patch to affected area once daily for [duration]." The order should specify the number of patches to be dispensed (e.g., "Dispense: 30 patches") and include instructions for the patient to wear the patch for up to 12 hours within a 24-hour period, then remove it for at least 12 hours before applying a new patch. It's essential to note that the patient should not wear more than one patch at a time unless specifically directed by the prescriber. The prescription should also indicate the affected area where the patch should be applied and any specific instructions for cutting the patch if needed (though this is generally not recommended). Lidocaine patches work by blocking sodium channels in nerve membranes, which prevents the initiation and conduction of nerve impulses, thereby providing localized pain relief without significant systemic absorption when used as directed, as supported by studies such as 1. Key considerations include:
- The patient's medical history and current medications to minimize potential interactions
- Monitoring for adverse effects, particularly in pediatric patients, as highlighted in 2
- Providing clear instructions for use to ensure patient safety and efficacy of the treatment
- Regular follow-up to assess the effectiveness of the treatment and adjust as necessary. Given the most recent and highest quality study available, 1, which examined the efficacy of transdermal 4% lidocaine patches for postoperative pain management, it is crucial to prioritize the patient's safety and the effectiveness of the treatment.