Interpersonal skills are particularly important in customer-facing roles. You will be expected to interact with others daily, often in a problem-solving role. Communicating clearly and active listening are key customer service skills, whether you are speaking with customers in person or on the phone.
Not my own work....From Google
But
Hope this helps you
Phenergan(promethazine) is generally used for allergies, motion sickness, and headaches. So theoretically you could. You'd have to check the dosages though.