Lidocaine-prilocaine Cream on IUD Insertion Pain

Assiut University

Status and phase: Completed; Phase 2

Conditions: IUD Pain

Treatments: Drug: lidocaine-Prilocaine cream; Drug: placebo cream

Study type: Interventional

Funder types: Other

Identifiers

NCT02658773

LPIUD

Details and patient eligibility

About

The purpose of the investigators' study was to evaluate whether cervical lidocaine-Prilocaine cream will improve pain scores compared to placebo. The investigators hypothesized that lidocaine-Prilocaine cream will reduce the insertion pain.

Full description

IUD can cause pain and discomfort in several ways: Use of the tenaculum to grasp the cervix and straighten the uterus for proper insertion; trans-cervical actions including measuring uterine depth, inserting the IUD insertion tube, and removing the tube; and placement of the device in the uterus.

To minimize the discomfort and the hazards of an IUD insertion, several measures have been proposed including NSAIDs, anxiolytics, and local anesthetics in the form of intracervical gel, cervical and para-cervical block, but there have not done enough studies about their effectiveness. According to the review published in the Cochrane, non-steroidal anti-inflammatory drugs and misoprostol are not effective on reducing an IUD insertion pain. Many trials have been done about effectiveness of lidocaine gel in reducing pain during IUD insertion and only one of those trials showed positive effect of 2% lidocaine gel, while others failed.

Lidocaine 2.5% and Prilocaine 2.5% Cream, is an emulsion in which the oil phase is a eutectic mixture of Lidocaine and Prilocaine cream in a ratio of 1:1 by weight. This eutectic mixture has a melting point below room temperature and therefore both local anesthetics exist as liquid oil rather than as crystals. Its absorption of from the genital mucosa is more rapid and onset time is shorter (5 to 10 minutes) than after application to intact skin. After a 5 to 10 minute application of Lidocaine-Prilocaine cream to female genital mucosa, the average duration of effective analgesia was 15 to 20 minutes.

Enrollment: 120 patients

Sex: Female

Ages: 20 to 40 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Women not taken analgesics or anxiolytics in the 24 hours prior insertion
• Women not taken misoprostol prior to IUD insertion
• No contraindication to or history of allergic reaction to lidocaine
• Women who will accept to participate in the study

Exclusion criteria

• Lidocaine allergy
• Any contraindication to IUD placement

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

---

120 participants in 2 patient groups, including a placebo group

lidocaine-Prilocaine cream

Active Comparator group

Description:

lidocaine-Prilocaine anesthetic cream placed into their cervix prior to having the IUD inserted

Treatment:

Drug: lidocaine-Prilocaine cream

placebo cream

Placebo Comparator group

Description:

an inert placebo cream placed into their cervix

Treatment:

Drug: placebo cream