If I eat a lot of fried pickles in one sitting can that raise my blood pressure or will I be okay? I had a past hx of prehypertension and it runs in my family

Whatever u chose to. eat,you should check your BP a few times monthly.If it's high,treat it.
Pickles. Pickles have a lot of salt in them so that could certainly raise your blood pressure.
It could. High salt foods will raise blood pressure. If you do this just once it will raise your BP for a while and then it will come back to normal. If you make a high salt diet a regular habit then you can end up worsening your blood pressure on a more permanent basis.