Do I get Botox once and then get the same dosage from then on?

I am thinking of getting frown line Botox for the first time.
I am curious because the recommended dosage varies slightly from hospital to hospital.

Initially, observe the reaction with a small dose.
I would like to know if there is a way to adjust it during the next procedure.

Matching the set capacity from the beginning and
Which do you more commonly do: reviewing the results after the first procedure or making adjustments for the next?

Are there actually any people whose dosage changed starting from the second Botox injection?

보톡스는 사람마다 근육량이나 움직임이 달라서 매번 같은 용량을 꼭 맞는 건 아니라고 하더라고요. 처음에는 근육 반응이나 표정 변화를 보고 다음 시술 때 용량이나 주사 위치를 조절하기도 한다고 해요. 미간은 표정에 영향을 줄 수 있어서 처음부터 무조건 많이 맞기보다는 의료진과 충분히 상담해보는 게 좋을 것 같아요.

Botox/Filler

Do I get Botox once and then get the same dosage from then on?