Can I take Telmisartan on an ad hoc basis - in case of high blood pressure?

Telmisartan is not suitable for emergency use in sudden blood pressure spikes.
It is a drug that works best when taken regularly, daily, because its effect develops gradually and lasts for a long time. Taking it "from time to time" will not lower blood pressure quickly and may give a false sense of security.

If you have episodes of sudden blood pressure rises, you should continue to take Telmisartan regularly every day at a fixed time, and if you have frequent spikes, talk to your doctor if you need to change your dose or add a medicine that works more quickly.

If the blood pressure exceeds 180/110 mmHg or is accompanied by serious symptoms (chest pain, shortness of breath, severe headache, visual disturbances), you need to seek medical help urgently.

If you need more personalized advice, you can use the teleconsultation here:

https://www.gdziepolek.pl/telekonsultacja/

You can check where you can buy Telmisartan in Poland here:

https://www.gdziepolek.pl/produkty/77784/toptelmi-telmisartan-sandoz-tabletki/apteki