Paradas was the centre of attention after sending off Mesut Ozil and Sergio Ramos on Wednesday night, the result seeing Real Madrid’s lead over Barcelona - which was 10 points last week - cut to six points.
Real boss Jose Mourinho was also sent to the stands, leading Pepe to insult the referee in the tunnel afterwards.
"When the match was over and we were in the tunnel, the number three of Real Madrid (Pepe) chased after me shouting 'what a rip-off! M*********er!'", Romero said in his report after the match.
"He had been booked in the 44th minute for simulation."
In a foul-tempered clash, Ozil was dismissed for ironically applauding the decision to show Ramos a second yellow card, with Mourinho having just been sent to the stands after leaving his technical area to protest a decision - despite a previous warning.
Madrid fitness coach Rui Faria had already been sent from the dugout for a similar offence as the Liga leaders - who had led through Cristiano Ronaldo’s 61st-minute goal - imploded in spectacular fashion.
Paradas also explained his other dismissals, with Ozil’s straight red card seeming harsh given it was a first offence.
"In the 84th minute Mesut Ozil was dismissed for the following reason: for applauding one of my decisions in an ironic manner, very close to my person.
"In the 52nd minute Sergio Ramos was shown a yellow card for repeated infringements. He was shown a second yellow on 84 minutes for leading with the arm while challenging for the ball.
"In the 53rd minute, coach Jose Mourinho was warned for questioning my decision. In the 82nd minute he left his technical area to question my decision, and was asked to go to the stands.
"Real Madrid physical trainer Rui Faria was sent off on 49 minutes for (ironically) applauding my decision from the bench."
Madrid have now drawn their last two matches 1-1, while Barcelona have won both their previous games 2-0, putting the defending champions on 66 points, six behind the leaders.
In recent weeks Barcelona players and management have questioned refereeing decisions, with Gerard Pique particularly angered that he was harshly sent off against Sporting Gijon.