Have you tried Triphala. I always travel with it . It’s an ancient Ayurvedic remedy for constipation ( among other gastrointestinal issues). It’s a combination of 3 berries. Works like a charm and feels natural.

On a trip to Bhutan, a fellow traveler was backed up for at least 5 days when I learned of the problem… I offered this remedy and he declined. Two nights later his wife knocked on my door and decided something had to be done… we were to hike up Tigers Nest ( a highlight and the end of an incredible journey) the next day and he was in such pain he couldn’t go.

Well, next morning he came to breakfast able and ready for the day… thanked me profusely.

I would opt for organic version.

Good luck