| Benzyl Alcohol | Preservative/Solvent | ⚠️ Yes — Benzyl Alcohol | A preservative and solvent used in injectable and topical formulations. |
| FD&C Blue No. 1 | Colorant | ⚠️ Yes — Dye | A synthetic blue dye. Less commonly allergenic than other dyes but reactions are documented. |
| FD&C Red No. 40 Aluminum Lake | — | ⚠️ Yes — Dye | — |
| Medium-chain Triglycerides | Solvent/Vehicle | ⚠️ Yes — Coconut | Fatty acid esters derived from coconut or palm kernel oil. Used as a solvent and vehicle in oral and topical formulations. May be relevant for individuals with coconut sensitivity. |
| Propylene Glycol? | Solvent/Humectant | ?Uncertain — Propylene Glycol | An organic compound used as a solvent and humectant. Can cause contact dermatitis in sensitive individuals. |
| Saccharin Sodium | Sweetener | ⚠️ Yes — Saccharin | An artificial sweetener. Rare sensitivities reported, including skin reactions. |
| Yellow Wax | Stiffening Agent | ⚠️ Yes — Insect | Unbleached beeswax. Used to thicken and stabilize ointments and creams. Animal-derived (from bees) — relevant for vegan patients. |
| .alpha.-terpineol | — | No | — |
| .alpha.-tocopherol Acetate | Antioxidant | No | Vitamin E acetate. Used as an antioxidant to protect active ingredients from degradation during storage. |
| Acrylic Acid-2-ethylhexyl Acrylate-2-hydroxyethyl Acrylate-vinyl Acetate Copolymer (for Duro-tak 87-2070)? | Adhesive | No | A pressure-sensitive adhesive polymer used in transdermal patches to hold the patch to the skin. |
| Ascorbyl Palmitate? | Antioxidant | No | A fat-soluble form of vitamin C used as an antioxidant in pharmaceutical formulations to prevent oxidation of fats and oils. |
| Benzyl Benzoate | Solvent/Preservative | No | An organic ester used as a solvent in injectable formulations and as a preservative. Can cause contact irritation. |
| Carnauba Wax | Coating/Polish | No | A natural wax from the leaves of the Brazilian palm tree. Used to polish and gloss-coat tablets. Plant-derived. |
| Corn Oil? | Solvent/Vehicle | No | Oil extracted from corn germ, used as a solvent and vehicle in oral formulations. Must be avoided by individuals with corn allergy. |
| D&C Red No. 6 Barium Lake | — | No | — |
| D&C Red No. 7 | — | No | — |
| Dimethiconol/trimethylsiloxysilicate Crosspolymer (40/60 W/w; 1000000 Pa.s)? | Skin Conditioner | No | A silicone elastomer blend used in topical formulations to provide a smooth, silky feel and improve product spreadability. |
| Ferric Oxide Red | Colorant | No | Red iron oxide pigment used in tablet coatings and capsule shells. A mineral-based colorant, distinct from FD&C synthetic dyes. |
| Ferric Oxide Yellow | Colorant | No | Yellow iron oxide pigment used in tablet coatings and capsule shells. A mineral-based colorant. |
| Ferrosoferric Oxide | Colorant | No | Black iron oxide used as a pigment in tablet coatings and capsule shells. Derived from iron, not from food allergen sources. |
| Glycerin | Humectant/Solvent | No | A sugar alcohol that attracts moisture. Used as a humectant, solvent, and sweetener in many oral and topical medications. Generally well tolerated. |
| Glyceryl Isostearate | Emulsifier | No | A glycerin ester used as an emulsifier and skin-conditioning agent in topical formulations. |
| Glyceryl Mono- And Dicaprylocaprate? | Emulsifier/Penetration Enhancer | No | Mixed glyceride esters used as emulsifiers and to enhance drug absorption through the skin. |
| Hamamelis Virginiana Top Water | Skin Conditioner | No | Witch hazel distillate, a plant-derived astringent used in topical formulations to soothe and tone the skin. |
| High Density Polyethylene | Packaging Component | No | A plastic polymer used in transdermal patch components and packaging. Not a traditional excipient but may appear in product listings. |
| Hyaluronate Sodium | Moisturizer/Viscosity Agent | No | Sodium hyaluronic acid. A naturally occurring substance used as a moisturizer and viscosity agent in ophthalmic and topical formulations. |
| Hydrogenated Coconut Oil? | — | No | — |
| Isopropyl Isostearate? | Emollient | No | A synthetic ester used as an emollient and skin-conditioning agent in topical formulations. |
| Isopropyl Myristate | Emollient/Penetration Enhancer | No | A synthetic ester used as an emollient and to enhance penetration of active ingredients through the skin. |
| Metanil Yellow? | Colorant | No | A synthetic yellow dye used as an indicator and colorant in pharmaceutical formulations. |
| Methyl Laurate | Emollient/Solvent | No | A fatty acid ester used as an emollient and solvent in topical formulations. |
| Octyldodecanol | Emollient/Solvent | No | A branched-chain fatty alcohol used as an emollient, solvent, and viscosity adjuster in topical formulations. |
| Phenoxyethanol | Preservative | No | A synthetic preservative used to prevent microbial growth in topical and some oral formulations. Can cause skin irritation in sensitive individuals. |
| Proline | — | No | — |
| Propylene Carbonate | Solvent | No | An organic solvent used in transdermal patches and topical formulations to dissolve active ingredients. |
| Shea Butter | Emollient | No | A fat extracted from the nut of the African shea tree. Used as an emollient and moisturizer in topical formulations. Tree nut-derived — may be relevant for individuals with tree nut allergies. |
| Silica Dimethyl Silylate | — | No | — |
| Silicon Dioxide | Glidant | No | A mineral (silica) used to improve powder flow during tablet manufacturing. Also called colloidal silicon dioxide. |
| Soybean | — | No | — |
| Stearalkonium Chloride? | Conditioning Agent | No | A quaternary ammonium compound used as a conditioning and antistatic agent in topical formulations. |
| Titanium Dioxide | Colorant/Opacifier | No | A white pigment used for coating opacity. Under regulatory review in some countries. |
| Tocopherol | Antioxidant | No | Natural vitamin E. Used as an antioxidant to protect active ingredients from oxidation and extend product shelf life. |