You're using about 10 seeds. Each seed weighs an average of 9.92 mg. They contain up to 0.44% alkaloids (97% of that being scopolamine). So they contain up to 43 micrograms of alkaloids per average sized seed. With 97% being scopolamine, that's up to 41.7 micrograms of scopolamine per seed. So 10 seeds come to a maximum of 417 micrograms of scopolamine. That's the same as the low end dose used for motion sickness and Parkinsonian Tremor, in which case the dose is repeated every 8 hours. For Parkinsonian Tremor it's often taken everyday.

The dose you're using is completely safe. I don't think you have anything to worry about. Some people use scopolamine everyday for various conditions. If you're taking 10 seeds once a day, that's less that's 1/3 the amount of scopolamine usually given to treat Parkinsonian Tremor.

While I don't see any real danger in any reports about long term scopolamine use in the dosage range you're using, I would still not do it everyday. I would skip at least 2 days a week.

It's not going to build up to dangerous levels in the dose you're using. People use 3 times that dose a day for Parkinsonian Tremor, often for years.