Many words in German and English seem similar but have very different meanings.
What’s (ärztliches) Rezept in English?
Rezept ⋅ = prescription
Do you need a prescription for these tablets?
It’s not “receipt”! receipt ⋅ [ri(si:t] = Quittung, Beleg
Here’s your receipt! You’ll need it for your taxes. Note: In the context of cooking, the correct translation of Rezept is recipe [(resepi].