No prescription needed--no doctor either.
Lanier
B
B
D005252:Fees, Pharmaceutical / Q000639:trends; D006634:Histamine H1 Antagonists / Q000191:economics; D006801:Humans; D004366:Nonprescription Drugs / Q000145:classification; D014481:United States; D014486:United States Food and Drug Administration
D006634:Histamine H1 Antagonists; D004366:Nonprescription Drugs