What over-the-counter drug can be used to improve defecation with Dulsevia?

I take dulsevia 6 weeks. for 4 weeks at a dose of 30 mg, from 2 weeks. 60 mg. I don't feel quite well yet, but I have the impression that it's easier for me to leave the house, the feeling of hopelessness is also slowly disappearing. side effects are strong. I can not sleep without a sleeping pill, I have a huge constipation, disgust and nausea in the afternoon. I hope that the body will eventually get used to it. I have 2 questions: 1. what over-the-counter medication can I take to improve bowel movements and 2. can I use an L-theanine supplement for dulsevia? I will be grateful for your reply. I wish you all health