There are always lots of people lined up at the pharmacy.
The pharmacy always has a lot of people lining up.
「薬局はいつもたくさんの人が並んでます」は英語で「There are always lots of people lined up at the pharmacy.」と言います。薬局は場所なので英語の「at the pharmacy (薬局で)」が自然だと思います。「The pharmacy always has a lot of people lining up.」も言えますが最後に「lining up (to do ~)((~するため)並んでいる」の次の情報が自然だと思うので以下の例を参考してください。
薬局はいつもたくさんの人が(マスクを買うために)並んでます。
There are always lots of people lined up at the pharmacy (to buy masks).
The pharmacy always has a lot of people lining up (to buy masks).