Complex sentence: The theoretical efficacy is similar to that of Combined Oral Contraceptive Pill (COCP), however they are taken continuously without any breaks between packets and must be taken to a much stricter time every day (within 3 hours vs COCP's 12 hours).
Split into simpler sentences: The theoretical efficacy is similar to that of Combined Oral Contraceptive Pill (COCP). However, they are taken continuously without any breaks between packets and must be taken to a much stricter time every day (within 3 hours vs COCP's 12 hours).