Can proton pump inhibitors cause heavy constipation?like say stop bowel movement for a day?if they do should one consider to stop them?

Possible: Ppi's do slow "gut motility" (how fast things move through your digestive tract. You may need to try a different one, as everyone can act a little differently and there are several options.

Probably not: The severe constipation could be due to other reasons. Please get a check up by your physician.

Unlikely: Ppi have a number of adverse effect of which diarrhea is one, constipation is not a side effect that is seen commonly.