yīshēng yǐjīng gěi wǒ kāichǔfāng le, wǒ xiànzài qù yàodiàn ná yào.

Because they often work together.

• 已经 means already
• 了 marks that an action has been completed or that there is a new situation

So 已经……了 is a very common pattern meaning has already done something.

In this sentence:

• 医生已经给我开处方了 = The doctor has already written me a prescription

Using both makes the sense of completion very clear.

Not exactly. Here 给 is not the main verb to give. It works more like a preposition meaning for or to someone.

So:

• 给我开处方 = write a prescription for me

The doctor is not giving me in the literal sense here; the doctor is doing the action for me.

A useful pattern is:

• 给 + person + verb + object

For example:

• 给我买咖啡 = buy coffee for me
• 给他写信 = write a letter to him

Chinese usually puts the person affected by the action before the main verb when using 给 in this kind of structure.

So the normal pattern is:

• 给 + person + verb + object

That gives:

• 给我开处方

A form like 开处方给我 is possible in some contexts, but 给我开处方 is the more standard and natural order here.

开处方 means to write a prescription or to prescribe medication.

Literally:

• 开 can mean open, but in medical or official contexts it often means issue, write out, or prescribe
• 处方 means prescription

So together, 开处方 is a fixed expression.

You can think of it as:

• 医生开处方 = the doctor writes a prescription

Because 开处方 functions as a verb-object phrase, and in natural Chinese the 了 often comes after the whole phrase.

So:

• 开处方了 sounds natural
• putting 了 directly after 开 would break up the verb-object phrase in a less natural way here

For learners, it is best to remember this chunk:

• 开处方了 = has written a prescription

Yes. 现在 means now or right now.

In this sentence, it shows the next action happening at the present moment:

• 我现在去药店拿药 = I’m going to the pharmacy now to get the medicine

So the sentence has a clear sequence:

1. The doctor already wrote the prescription.
2. Now I am going to the pharmacy.

This is a very common learner question.

拿药 here means to get medicine, pick up medicine, or collect medicine.

Even though 拿 literally means take or hold, in this context it means going to receive or collect the medicine that has been prescribed.

It is not the same as 买药:

• 买药 = buy medicine
• 拿药 = pick up / collect medicine, especially after seeing a doctor

So in a hospital or prescription context, 拿药 is very natural.

Chinese often repeats the subject when starting a new clause, especially when it helps make the sentence clearer.

So:

• 医生已经给我开处方了，我现在去药店拿药。

The first clause has 医生 as the subject. The second clause has 我 as the subject.

Repeating 我 makes the switch very clear:

• first, the doctor did something
• then, I do something

Chinese can omit subjects when they are obvious, but here the repetition is perfectly natural and helpful.

Yes, in conversation it could.

For example:

• 医生已经给我开处方了，现在去药店拿药。

This can still be understood as The doctor has already written me a prescription, so now I’m going to the pharmacy to get the medicine.

But including 我 is clearer, especially for learners and in careful speech.

Yes. 去 means to go, and it can be followed by a place and then an action.

Structure:

• 去 + place + verb

So:

• 去药店拿药 = go to the pharmacy to get medicine

This is very common in Chinese.

Other examples:

• 去学校上课 = go to school to attend class
• 去商店买东西 = go to the store to buy things

Yes, 药店 usually means pharmacy or drugstore.

In this sentence, 去药店拿药 means going to the pharmacy to pick up medicine.

Depending on the real-life situation, a Chinese speaker might also say 药房, especially for a pharmacy inside a hospital. But 药店 is perfectly understandable and natural.

It has both.

• The first clause refers to a completed action: the doctor has already written the prescription
• The second clause refers to the speaker’s current or immediate next action: I’m going now to get the medicine

So the full sentence describes a sequence:

• completed action first
• present/immediate action next

That is why 已经 and 现在 work well together in the same sentence.