The best replacement for impaction is obstruction.

The best alternatives to impaction are rated as following:
★★★★★  obstruction
★★★★★  constipation
★  bowel obstruction
★  blockage
★  severe constipation
★  obstipation
★  diarrhea

Your alternative for impaction is not listed? Suggest!
Speaking about impaction, one probably shouldn't forget about leopard gecko.

Other search terms related to impaction and their ratings are:
★★★★★ leopard gecko
★★★ bearded dragons
You have in mind a companion for impaction and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of impaction in all years. Click on graph for more.
impaction
obstruction
constipation