Paragard Does NOT Contain Hormones
Paragard (TCu380A) is a copper-only intrauterine device that contains no hormones whatsoever. It works through a purely mechanical and spermicidal mechanism involving copper ions, not through hormonal effects 1, 2.
Key Distinguishing Features
The Paragard copper IUD differs fundamentally from hormonal IUDs:
- Copper mechanism: The device releases copper ions that create a spermicidal environment and prevent fertilization through a prefertilization mechanism 2, 3
- No hormonal component: Unlike the levonorgestrel-releasing IUDs (Mirena, Skyla), Paragard contains zero hormones 1, 3
- Duration: Approved for 10 years of use 1, 4
Clinical Implications of Being Hormone-Free
Because Paragard contains no hormones, users experience different effects compared to hormonal contraceptives:
Expected side effects:
- Increased menstrual bleeding and cramping (most common side effect) 3
- No hormonal side effects like headaches, nausea, mood changes, or decreased libido that can occur with hormonal IUDs 3
- Menstrual blood loss typically increases rather than decreases 1
Advantages of hormone-free contraception:
- Ideal for women who cannot or prefer not to use hormonal contraceptives 4
- No systemic hormonal effects
- Maintains natural menstrual cycles
Common Pitfall
Do not confuse Paragard with the levonorgestrel-releasing IUDs (LNG-IUS) like Mirena, which DO contain progestin hormones. These are entirely different devices with different mechanisms, side effect profiles, and clinical indications 1, 3.