Strictly speaking, the shelf life you said should be five months after the shelf life. Shelf life is the best period for food consumption. During this period, merchants can guarantee excellent and stable quality. The expiration of the shelf life does not mean that the goods must be spoiled and inedible, but the merchants cannot guarantee the best quality and there is a risk of deterioration. If the companion tablets and Yan Liang capsules you mentioned are unopened and kept properly, there should be no problem. Don't worry, you can compare it with the shelf life. Generally, the appearance and smell of deteriorated products are different.