| Benzoic Acid | Preservative | ⚠️ Yes — Benzoic Acid | A preservative related to sodium benzoate. Same allergy cross-reactivity concerns. |
| Cetostearyl Alcohol | Emulsifier/Stiffening Agent | ⚠️ Yes — Stearyl Alcohol | A mixture of cetyl and stearyl alcohols (fatty alcohols, not drinking alcohol). Used to thicken and stabilize creams and ointments. Can cause contact dermatitis in sensitive individuals. |
| Cetyl Alcohol? | Emulsifier/Thickener | ?Uncertain — Cetyl Alcohol | A fatty alcohol used in topical formulations. Can cause contact dermatitis. |
| Cocoa Butter | Suppository Base | ⚠️ Yes — Chocolate | A fat derived from cocoa beans used as a melting base in suppositories and some topical formulations. May affect individuals with chocolate or cocoa sensitivity. |
| Egg Phospholipids | — | ⚠️ Yes — Egg | — |
| 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. |
| Methylparaben | Preservative | ⚠️ Yes — Parabens | A preservative used to prevent microbial growth. Can cause allergic contact dermatitis in sensitive individuals. |
| Peg/ppg-18/18 Dimethicone? | Emulsifier/Skin Conditioner | ?Uncertain — PEG | A silicone-based emulsifier combining PEG and polypropylene glycol with dimethicone. Used in topical formulations for smooth application. |
| Propylene Glycol? | Solvent/Humectant | ?Uncertain — Propylene Glycol | An organic compound used as a solvent and humectant. Can cause contact dermatitis in sensitive individuals. |
| Propylparaben | Preservative | ⚠️ Yes — Parabens | A paraben preservative used to prevent microbial growth. Can cause contact dermatitis in paraben-sensitive individuals. |
| Sucrose | Sweetener/Coating | ⚠️ Yes — Sucrose | Common table sugar. Problematic for individuals with sucrose intolerance or congenital sucrase-isomaltase deficiency. |
| Butylated Hydroxytoluene | Antioxidant | No | BHT. A synthetic antioxidant used to prevent oxidative degradation of fats and oils in pharmaceutical products. Rare contact sensitivity reported. |
| Butylene Glycol | Humectant/Solvent | No | A synthetic glycol used as a humectant and solvent in topical formulations. Helps products spread smoothly on skin. |
| Carbomer Copolymer Type A (allyl Pentaerythritol Crosslinked)? | Thickener/Gelling Agent | No | A crosslinked acrylic acid copolymer used to create clear gels and thicken topical formulations. |
| Carbomer Copolymer Type B (allyl Pentaerythritol Crosslinked) | — | No | — |
| 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 100 | — | No | — |
| Dimethicone 12500? | — | No | — |
| Dimethylaminoethyl Methacrylate - Butyl Methacrylate - Methyl Methacrylate Copolymer? | Coating Agent | No | A methacrylic polymer (Eudragit E) that dissolves in acidic conditions. Used for taste-masking and moisture-protective coatings. |
| Ethyl Oleate? | — | 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. |
| 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. |
| Hexylene Glycol | Solvent/Humectant | No | A synthetic glycol used as a solvent, humectant, and viscosity reducer in topical formulations. |
| 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. |
| Lanolin Oil? | Emollient | No | An oil derived from sheep wool (lanolin). Used as an emollient and skin conditioner. Animal-derived — relevant for vegan patients. Can cause contact dermatitis in lanolin-sensitive individuals. |
| Methionine? | — | No | — |
| Microcrystalline Wax? | Stiffening Agent | No | A petroleum-derived wax used to adjust consistency in ointments and as a coating agent. |
| Phenoxyethanol | Preservative | No | A synthetic preservative used to prevent microbial growth in topical and some oral formulations. Can cause skin irritation in sensitive individuals. |
| Polyquaternium-7 (70/30 Acrylamide/dadmac; 1600000 Mw) | — | No | — |
| Polysorbate 60 | Emulsifier | No | A non-ionic surfactant used to emulsify and stabilize oil-in-water formulations. Derived from sorbitol and stearic acid. |
| 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. |
| Sodium Hydroxide | pH Adjuster | No | A strong alkali used to adjust the pH of pharmaceutical solutions. Present only in trace amounts in the final product. |
| Sodium Pyrrolidone Carboxylate | Humectant | No | Sodium PCA. A natural moisturizing factor component used as a humectant in topical formulations. |
| Titanium Dioxide | Colorant/Opacifier | No | A white pigment used for coating opacity. Under regulatory review in some countries. |
| Trehalose Dihydrate | Stabilizer/Cryoprotectant | No | A natural disaccharide used to stabilize proteins in freeze-dried formulations and to protect biological products. |
| Trideceth-10 | — | No | — |
| Urea | — | No | — |
| 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. |