| Benzyl Alcohol | Preservative/Solvent | ⚠️ Yes — Benzyl Alcohol | A preservative and solvent used in injectable and topical formulations. |
| Cetyl Alcohol? | Emulsifier/Thickener | ?Uncertain — Cetyl Alcohol | A fatty alcohol used in topical formulations. Can cause contact dermatitis. |
| 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. |
| PEG-20 Sorbitan Isostearate | Emulsifier | ⚠️ Yes — PEG | A PEG-modified sorbitan ester used as a non-ionic emulsifier in topical formulations. |
| Propylene Glycol | Solvent/Humectant | ⚠️ Yes — Propylene Glycol | An organic compound used as a solvent and humectant. Can cause contact dermatitis in sensitive individuals. |
| Sodium Benzoate | Preservative | ⚠️ Yes — Sodium Benzoate | A food preservative. Can cause urticaria and exacerbate asthma in sensitive individuals. |
| 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. |
| Aluminum Hydroxide | Antacid/Adjuvant | No | An aluminum salt used as an antacid ingredient and as an adjuvant in some vaccine formulations. |
| Cyclomethicone 5 | Emollient/Carrier | No | A volatile silicone that evaporates quickly, leaving a smooth feel. Used as a carrier and emollient in topical products. |
| Dimethicone 20 | Skin Protectant | No | A silicone-based polymer used as a skin protectant, emollient, and anti-foaming agent in topical formulations. |
| Erythorbic Acid? | — | No | — |
| 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. |
| Hamamelis Virginiana Top Water | Skin Conditioner | No | Witch hazel distillate, a plant-derived astringent used in topical formulations to soothe and tone the skin. |
| Hydrogenated Soybean Lecithin | Emulsifier | No | A hydrogenated form of soy lecithin used as an emulsifier and stabilizer. Derived from soy — must be avoided by individuals with soy allergy. |
| Hydrogenated Soybean Phosphatidylcholine | — | No | — |
| Metanil Yellow? | Colorant | No | A synthetic yellow dye used as an indicator and colorant in pharmaceutical formulations. |
| Microcrystalline Wax? | Stiffening Agent | No | A petroleum-derived wax used to adjust consistency in ointments and as a coating agent. |
| Pentasodium Pentetate? | — | No | — |
| Polysorbate 60 | Emulsifier | No | A non-ionic surfactant used to emulsify and stabilize oil-in-water formulations. Derived from sorbitol and stearic acid. |
| Potassium Sorbate | Preservative | No | A potassium salt of sorbic acid used to inhibit mold and yeast growth in pharmaceutical formulations. |
| Silica Dimethyl Silylate | — | No | — |
| Stearic Acid | Lubricant | No | A fatty acid used as a lubricant in tablet manufacturing. |
| Tocopherol | Antioxidant | No | Natural vitamin E. Used as an antioxidant to protect active ingredients from oxidation and extend product shelf life. |
| Xanthan Gum | Thickener/Stabilizer | No | A polysaccharide produced by bacterial fermentation, used to thicken and stabilize liquid and semi-solid formulations. Derived from corn sugar fermentation — may be relevant for corn-sensitive individuals. |