Lactic Acid, L- (L-lactic acid, L-lactate) is the levorotatory isomer of lactic acid, the biologically active isoform in humans. Lactic acid or lactate is produced during fermentation from pyruvate by lactate dehydrogenase. Lactate dehydrogenase is isomer-specific so that production and metabolism of D-lactate require D-LDH and L-lactate requires L-LDH. Mammalian cells only contain L-LDH so that in humans the lactate produced is almost exclusively L-lactate. Carbohydrate-fermenting bacterial species (e.g. lactobacillus spp) have by contrast both enzymes and therefore the capacity to produce both D-lactate and L-lactate. L-lactic acid is the primary agonist of hydroxycarboxylic acid receptor 1 (HCA1), which is a Gi/o-coupled G protein-coupled receptor (GPCR). Poly-L-lactic acid is an absorbable, semi-permanent, injectable implant that can be used to restore volume and stimulate collagen formation gradually. It is FDA-approved for the correction of facial fat loss associated with antiretroviral therapy-induced lipoatrophy in HIV patients. It is FDA-approved for use in immunocompetent people for the correction of nasolabial fold deficiencies and other facial wrinkles. It has been used off-label to enhance the cheeks, hands, neck, thighs, gluteal enhancement and chest wall deformities, such as pectus excavatum or thoracic deformities secondary to surgical procedures.

Drometrizole trisiloxane is a lipophilic benzotriazole derivative marketed as Mexoryl XL by L'Oréal and is used in sunscreens as a (UV) filtering agent that provide a high sun protection factor (SPF) for daily photoprotection of skin against UV damage and delay the signs of aging. Drometrizole trisiloxane is a broad-spectrum UV absorber with two absorption peaks, one at 303 nm (UVB) and one at 344 nm (UVA). Sunscreens with drometrizole trisiloxane are approved within the EU, Australia and other contries but not in the United States.

Firocoxib is a selective COX-2 inhibitor which was approved by FDA and EMEA for the treatment of osteoarthritis and postoperative pain in dogs (Previcox trade name) and horses (Equioxx trade name). The drug is not for human use.

Phenoxyethanol, also known as Ethylene Glycol Monophenyl Ether, is a glycol ether and bactericide (that functions as a disinfectant, antiseptic or antibiotic) that is primarily used as a preservative in cosmetics and beauty products. It is used as a preservative in vaccines. Phenoxyethanol is included in topical antiseptic solutions, like octenisept used for the treatment of traumatic, acute, chronic, surgical and burn wounds, the treatment of bacterial vaginosis, acne lesions and as the mucous membrane antiseptic.

Medronic acid (conjugate base, medronate) is a diagnostic agent that is used in complex with technetium Tc-99m for imaging delineate areas of altered osteogenesis. Upon administration the complex binds to hydroxyapatite crystals in bone.