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One Year Study of Implanon on the Adverse Events and Discontinuation

314

Somsak Chaovisitsaree, MD*, Wirawit Piyamongkol, MD, PhD*,
Saipin Pongsatha, MD*, Nuntana Morakote, MPH*,
Supranee Noium, BSc*, Nuchanart Soonthornlimsiri, BSc*

* Department of Obstetrics and Gynecology, Faculty of Medicine, Chiang Mai University

Abstract


Objective: To determine adverse events and discontinuation of Implanon in healthy Thai women between 16 and 45 years of age.
Design: Prospective descriptive study.
Setting: Family Planning Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Chiang Mai University.
Subjects: Ninety-two female volunteers with eligible criteria, no contraindication for hormonal contraceptive and wished to have long term contraception were recruited.
Main outcome measures: Determination of adverse events was done three months after Implanon insertion. Discontinuation of Implanon use was reviewed during the study period of one year.
Results: Amenorrhea (40.2%) and infrequent bleeding (39.1%) were the most menstrual adverse events. While most non- menstrual adverse events were headache/dizziness (27.2%) and lower abdominal pain (23.9%). Severe non-menstrual side effect was rare (1-2%). Seven subjects (7.6%) discontinued using Implanon during the one year period of study.
Conclusion: Implanon demonstrated a high continue rate at the first year of insertion. It produced similar adverse events like other progestin-only contraceptives. Counseling before insertion is important for increased client satisfaction and a higher continuation rate.

Keyword : Implanon, Hormonal contraceptive implant, Adverse event, Discontinuation



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