The review found no eligible studies for this question.
It is very uncertain whether antifibrinolytics changes adverse events (any) compared with herbal medicines (very low certainty).
It is very uncertain whether antifibrinolytics changes adverse events (any) compared with levonorgestrel intrauterine system (very low certainty).
Antifibrinolytics showed no clear difference in adverse events (any) compared with no treatment or placebo (low certainty).
Antifibrinolytics may leads to lower adverse events (any) compared with progestogens (low certainty).
Laparoscopy showed no clear difference in any adverse events compared with open appendicectomy (low certainty).
Laparoscopy showed no clear difference in any adverse events compared with 'wait and see' strategy (moderate certainty).
It is very uncertain whether dopamine agonist plus co‐intervention changes any other adverse events compared with co‐intervention (very low certainty).
It is very uncertain whether dopamine agonist changes any other adverse events compared with placebo/no intervention (very low certainty).
Endometrial resection or ablation showed no clear difference in safety Any serious adverse events compared with open hysterectomy (low certainty).
It is very uncertain whether combined oral contraceptive pill changes adverse effects ‐ Any adverse events compared with levonorgestrel‐releasing intrauterine system (very low certainty).
Combined oral contraceptive pill probably leads to higher adverse events ‐ Any adverse events (treatment‐emergent) compared with placebo (moderate certainty).