Final answer:
The initial treatment regimen for a patient experiencing anxiety symptoms such as palpitations, sweating, trembling, and shortness of breath typically involves a combination of psychotherapy and medication.
Step-by-step explanation:
The patient is presenting with symptoms of palpitations, sweating, trembling, and shortness of breath, which are indicative of anxiety. The initial treatment regimen for anxiety would typically involve a combination of psychotherapy and medication. Psychotherapy can help the patient understand and manage their anxiety, while medication such as selective serotonin reuptake inhibitors (SSRIs) or benzodiazepines can be prescribed to alleviate the symptoms and promote relaxation.