What is the primary use of transdermal patches containing fentanyl?

Transdermal patches containing fentanyl are primarily used for long-term opioid administration. This method of delivery allows for a steady release of the medication over an extended period, typically ranging from 72 hours to several days, which makes it particularly suitable for patients requiring consistent pain management, such as those with chronic pain conditions or those recovering from surgery. The sustained release minimizes the peaks and troughs associated with other forms of administration, like oral or intravenous opioids, providing patients with more stable pain control.

Using transdermal patches can also reduce the frequency of dosing, which enhances patient compliance and convenience. This delivery system bypasses the gastrointestinal tract, making it beneficial for patients who may have difficulties swallowing or absorbing oral medications.

The other options do not align with the primary use of fentanyl patches. Immediate pain relief is typically provided by faster-acting forms of opioids rather than transdermal patches, which are not designed for acute pain scenarios. Patches do not have a role in preventing infections during surgeries, as that is typically managed through other means such as antiseptics or antibiotics. Additionally, fentanyl is not used to treat anxiety disorders, as it is a powerful opioid and not indicated for such conditions.