doi: 10.1046/j.1365-2559.1999.00714.x
These are called dual agonists
Three patients did not have retrievable prescription records within the electronic medication database and were therefore excluded from dose-level exposure analyses but remained included in clinical and safety analyses

Important considerations before combining these medications include: Absolute contraindications : The combination should be avoided in patients with cardiovascular disease, uncontrolled hypertension, hyperthyroidism, glaucoma, during or within 14 days of MAOI use, personal/family history of MTC or MEN2, pregnancy, breastfeeding, or severe gastrointestinal disease Cardiovascular risk assessment : Phentermine increases heart rate and blood pressure, which requires careful monitoring with baseline and follow-up measurements of vital signs and possibly EKG if cardiac history exists Gastrointestinal tolerability : Tirzepatide commonly causes nausea, vomiting, and diarrhea, which may be compounded by phentermine's effects Medication interactions : Tirzepatide may reduce the effectiveness of oral contraceptives during initiation and dose escalation
Sustained Energy Levels: Daily use helps reduce oxidative damage and supports metabolism, leading to reduced fatigue
Bad choices can make these health problems worse