"Tu n'as pas le droit d'acheter ça sans ordonnance."

Translation: You are not allowed to buy that without a prescription.

[revles]

British English would normally say 'without prescription' rather than 'without a prescription'.

[cricri811231]

you have no right to buy that without a prescription, could be correct ?

[Daleswords]

You can't buy that without a prescription should be accepted.

[AndrewHall814283]

Would that not be

Tu ne peux pas acheter ça sans ordonnance.

As opposed to taking about having a right, or being allowed to buy that.

[--Roody--]

"Can" is used to mean a) be able to and b) have permission to.

So, with the second meaning,

• he can buy it = he may buy it = he is allowed to buy it

[Roland655103]

"You have not the right to buy that without a prescription" is a literal translation but is not accepted?

[roemer]

It's always harder when English is not your first language. Next time, try: "you don't have the right..."

[JoanSmith0]

Since "sans ordonnance" translates to without A prescription, why no French article for "ordonnance"