Can I take Ashwagandha if I take Prestilol 5+10?

Yes, you can use Ashwagandha with caution. Frequent pressure control will be a good procedure. I encourage you to inform your doctor about all medicines and dietary supplements used, which will allow you to choose a safe and effective pharmacotherapy.

Research suggests that Ashwagandha may exhibit additive (summable) effects with antihypertensive drugs (here: Prestilol).

Please remember that all preparations containing Ashwagandha are dietary supplements and data on their effectiveness or safety are limited. Clinical studies have shown efficacy in subjective stress after 60 days of use. The dose is also important, 240-600mg per day. These types of preparations will not work after 1 tablet, so it is too early to assess the effectiveness of the preparation.

I enclose additional information that may be helpful:
https://www.gdziepolek.pl/substancje/ashwagandha