If you forget to take a tablet of Acovil when should you take your next tablet?

I hope it's not too late, Acovil will gain efficacy and potency through the constant administration during several weeks. It's their metabolites (processed drug in the body) that will continue to make effect. Any approach will be considered appropiate, some will say to skip the dose until the next one or others will say to take the tablet. Since the effect after administration raises in 3-4 hours, my personal approach, will be that if 12 hours have not yet passed then take the pill and take the next one as usual, however, if more than 12 hours have passed then just forget about the skipped dose and take the next one.