Honestly if your practioner has limited the scope of pharmacological therapy agents to antihistamines and SSRI agents , you need to see someone else .
Part of the practice of medicine involves looking at All of the options to accomplish a goal ,and explaing those options to the patient , so you can jointly plan the patients care , inherent in that is a patient giving informed consent , if the provider artificialy limits those options by refusing to prescribe certain things for whatever reason ,there is no informed consent when you are not informed of all your options, the practioner is lying to themselves and the patient about there care and treatment , lying or deception in patient care should never be accepted or tolerated by anyone , telling patients they are dying is uncomfortable and no one really wants to do it but it is done because being less than honest is unethical ,and so is denying the patients access to other medications because they have a potential for abuse , hiding your head in the sand about these agents doesn't make them any better or worse treatment choices, I feel very strongly that practioners that do this need to be run out town on a rail , they are consulting with patients to make educated decisions about there healthcare for compensation , leaving options off the table because you don't want to put the time time or care into the relationship of explaing proper use and potential benefits or weakness of any particular class of agents is at best unethical at worst malpractice.