law: Drugs (Control) Act, 1950 
  8. Refusal to sell. - 
  No dealer or producer shall, unless previously
  
  authorized to do so by the Chief Commissioner, without sufficient cause refuse
  
  to sell to any person any drug within the limits as to quantity, if any,
  
  imposed by this Act.
   Explanation. - The possibility or 
  
  expectation of obtaining a higher price for a drug at a later date shall not be 
  
  deemed to be a sufficient cause for the purpose of this section.