Brand name: Brethine, Bricanyl

What's the difference between a brand Brethine, Bricanyl and name Terbutaline Sulphate ?
Not much, except for name and price. A generic drug is called by its chemical name; a manufacturer assigns a brand name. The products have the same ingredients.
Standard practice and most state laws require that a generic drug be generically equivalent to its brand-name counterpart. That is, it must have the same active ingredients, strength, and dosage form - pill, liquid, or injection. The generic drug also must be therapeutically equivalent - it must be the same chemically and have the same medical effect.

Shipping is free regardless of destination. There are no hidden fees. Orders are sent by Registered Air Mail. Delivery time to the USA is typically 10 business days after we have sent the order, though it can take longer.