Does Auglavin PPH affect the effectiveness of Slinda tablets?

Hello. If from July 20 for 7 days I used the antibiotic Auglavin PPH 875 mg + 125 mg, does it mean that for 28 days I have to additionally protect myself or 14 days of additional protection is enough? In the leaflet of the drug there are such indications: Since the effect of another drug on the drug Slinda can last up to 28 days after its discontinuation, it is necessary to use such a long additional mechanical contraceptive method"