In the end, Gu Yan took a bagful of herbs before leaving the pharmacy.
She was eager to find out whether she could still save Chen Yuan.
Naturally, she specifically advised him to continue his current treatment program in the hospital.
As long as his condition improved, he would be able to undergo normal procedures in the hospital.
On top of everything, Gu Yan needed to find a good excuse to stay in contact with him. In Xie Luan's case, she used the massage to conceal the abilities of the pendant.
As for Chen Yuan, she would use the secret recipe as a cover-up.
Given Chen Yuan's condition, his family was at their wit's end. Hence, they were willing to accept an unconventional method even if it didn't seem scientific.
Of course, even if they were merely going to try the method, they still examined the herbs Gu Yan mentioned.