Dorries has been an MP for Mid-Bedfordshire since 2005, but it is likely she will miss important votes in the House of Commons and the Chancellor's Autumn Statement while taking part in the series.
Commentators have quickly voiced concerns about her commitment to her constituents and her work as an MP while she is being paid to appear on the entertainment show filmed in Australia.
Meanwhile, it has been reported that Dorries's local party association in Mid-Bedfordshire is holding a meeting about her future as MP. The Daily Mail's James Chapman claims that the party didn't know anything about her involvement in the show.
Dorries has said that she wants to take part in the Ant & Dec-hosted series to campaign for reducing the time limit on abortions.
"I'm doing the show because 16 million people watch it. Rather than MPs talking to other MPs about issues in Parliament, I think MPs should be going to where people go," she said.
"Parliament is in half-term while I'm there. I've not done anything to prepare for the jungle. I worked right up until I left the UK for Australia."
[Louise Mensch - left / Lembit Opik - right]
Ex-Conservative MP Louise Mensch, who was previously tipped to take part in I'm a Celebrity herself, was vocal in her criticism of Dorries's decision, writing on Twitter: "What did she tell the whips, and how much is she being paid?
"Nadine pretending that a serious issue like abortion rights is why she did this is the lowest of the low. Indefensible stuff."
Dorries's only support came from ex-Lib Dem MP Lembit Opik, who starred on the show in 2010 after losing his seat.
"Good on Nadine Dorries for the jungle if she's really going in. Go gal!" wrote Opik.
Meanwhile, comic David Schneider mocked Dorries's stance on abortion, tweeting: "If you want to eat bugs etc, go for it! A woman has the right to do what she wants with her own body, isn't that right?"
I'm a Celebrity launches on Sunday, November 11 at 9pm on ITV1.
I'm a Celebrity 2012 - rumoured lineup: