If I take a Slinda tablet within 5/6 hours of the scheduled hour, will its effectiveness decrease?

Information in the summary of product characteristics: 'Tablets should be taken every 24 hours. If you take the pill later, the contraceptive effectiveness may be reduced. In this case, the use of a mechanical contraceptive method, e.g. a condom, should be considered for the next 7 days." If you take a tablet 6 hours after the standard hour of taking Pinda, I would advise you to follow the above recommendations, and take the next tablets at a fixed time. I recommend the article: https://www.gdziepolek.pl/artykuly/jak-prawidlowo-stosowac-antykoncepcje