The 2.5 mg dosage is for treatment initiation and is not approved as a maintenance dosage
Tirzepatide Once Weekly for the Treatment of Obesity (SURMOUNT-1) New England Journal of Medicine (2022) 6

Benefits: How to use: Major Ingredients Butylene Glycol, 1,2-Hexanediol, Dipropylene Glycol, Sesamum Indicum (Sesame) Seed Extract, Angelica Gigas Root Extract, Morus Alba Bark Extract, Polygonum Multiflorum Root Extract, Scutellaria Baicalensis Root Extract, Cimicifuga Racemosa Root Extract, Sophora Flavescens Root Extract, Water, Alpha-Bisabolol (100ppm), Allantoin, Morus Alba (Mulberry) Fruit Extract, Phellinus Linteus/Inonotus Obliquus (Mushroom) Extract, Pentylene Glycol, Cellulose Gum, Tranexamic Acid, Paeonia Lactiflora Root Extract, Caprylyl Glycol, Polyglyceryl-4 Caprate, Dipotassium Glycyrrhizate, Betaine, Glycosyltrehalose, Commiphora Myrrha Resin Extract, Perilla Frutescens Leaf Extract, Ethylhexylglycerin, Arbutin, Hydroxyethyl Cellulose, Methyl Gluceth-20, Sodium Hyaluronate, Glycyrrhiza Glabra (Licorice) Root Extract (500ppm), Yucca Schidigera Root Extract, Hydrogenated Starch Hydrolysate, Glycerin, Purified Water, Arginine, Glycyrrhiza Glabra (Licorice) Root Extract, 000 Ppm), Disodium Edta, Aspalathus Linearis Extract, Glutathione, Glutathione (5, Niacinamide, Niacinamide (20, Oryza Sativa (Rice) Bran Water (73%), Pearl Extract (10, Carbomer, Phellinus Linteus Extract This list of ingredients represents all options or variants of this product

They may progress through multiple stages of involution with an eventual return to normal-appearing skin
Thats what happened to Beccarelli, who gradually gained more than 25 pounds while taking a hormone blocker