Pharmacy or Chemist is a place where you buy medicine.
Or "drug store" in American English
Pharmacy or chemist should be valid alternatives.
How would you say a drug house? i.e. a meth house; a place where they make and/or sell illegal drugs.
Is that something American? In Nairobi it would be a pharmacy
Yes. This course is mostly written by Tanzanian Peace Corps volunteers, who are American.