Is there a way to make the redirect URL NOT include all the information that was submitted.

I implemented the form on my wordpress site and after submit I sent the user back to the page they were on via the redirect_url.. But now my site URL has
http://mywordpresssite.com/?last_name=testing&phone_work=123&webtolead_email1 =testing@example.com&campaign_id=151b7624-1015-9057-5da9-4b018a810ff5&redirect_url=http%3A%2F%2Fmywordpress site.com&assigned_user_id=1&req_id=inquiry_name%3B inquiry_phone%3Binquiry_email%3B&client_id_address =1.2.3.4

I don't want users to see this information.

Is there a way to tell sugar not to add it to the redirect URL?