Provided herein are pharmaceutical formulations, methods, and systems for treating regional fat deposits and fat-related conditions and indications. Methods comprise administering a pharmaceutical formulation comprising a long-acting beta-2 adrenergic receptor agonist, for example, salmeterol, suitable for subcutaneous administration. Formulations comprise a pharmaceutical formulation that is suitable for subcutaneous injection comprising: (a) a lipophilic long-acting selective beta-2 adrenergic receptor agonist, or a salt thereof； and (b) at least one subcutaneously acceptable inactive ingredient.
