A Study Testing Topical Pain-Relieving Herbal Plasters in People Who Are Using Opioids for Their Pain

Inclusion Criteria: * English speaking with age ≥ 18 years or older * A diagnosis of cancer with no restrictions placed on type of cancer or stage. Eligibility criteria will not be restricted to MSK confirmed biopsy/diagnosis. Outside institution's testing is sufficient. * Ambulatory (Karnofsky Performance Status of ≥ 60) * Having one of three types of pain (e.g., musculoskeletal pain, bone metastasis pain, and visceral/abdominal pain) and the worst pain area can be covered by one patch of topical herbal plaster * Worst pain score (measured by the 0-10 numeric pain rating scale) 4 or above in the preceding week * Current use of short-term oral opioids (i.e. oxycodone, morphine immediate release, or hydromorphone) for pain management. * Willingness to adhere to and understanding of all study-related procedures, including randomization to one of the two possible study arms * Able to understand informed consent and provide signed informed consent form Exclusion Criteria: * Patients are unwilling to reduce opioid use if their pain reduces * Patients have generalized musculoskeletal pain such as fibromyalgia as primary source of pain * Patients with clinician confirmed significant skin disorders such as severe eczema, psoriasis, severe xerosis, chronic dermatitis, or adhesive allergy. * Patients with open wounds, infections, skin trauma at skin overlying area of pain * Patients with documented history of skin sensitivity to adhesive or allergic reaction to other patches or topi…