5-10 years : Paraguard (copper-based) & the Mirena (levonorgestrel) (progestin based) are effective for 10 & 5 years respectively. If you're referring to the side effects of spotting or cramping, this usually last a week or two & with menstrual cycles for the first few months. If you have problems beyond this, see your doc for evaluation. It may be poorly placed, extruding, or simply not for you. Good luck.
Answered 8/17/2018
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