I need to go get my prescription

I need to go get my prescription filled. So I'll be back in a while.

get a prescription filled 药剂师按处方给病人拿药

1.I went to the pharmacy and got my prescription filled.

2.The drugs are available by prescription only.

3.Could you write me a prescription for sth?

4.Are you taking any prescription medications?

pharmacy:药店

prescription drugs：处方药

non-prescription drugs:非处方药

OTC=over the counter drugs：非处方药

take prescription medication:服用处方药

5.I am pleased to announce that i am currently off prescription medication.

sb be off sth某人不再吃药

6.Why did the doctors take you off?

take sb off 停止某人的药物