| 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 | ⚠️ Yes — Cetyl Alcohol | A fatty alcohol used in topical formulations. Can cause contact dermatitis. |
| Dichlorobenzyl Alcohol | Preservative/Antiseptic | ⚠️ Yes — Benzyl Alcohol | An antiseptic alcohol used as a preservative in throat lozenges and oral formulations. |
| Peanut Oil? | Vehicle/Solvent | ?Uncertain — Peanut | A nut-derived oil used as a vehicle in some capsules and injectable formulations. Risk for peanut-allergic patients. |
| PEG-100 Monostearate | Emulsifier | ⚠️ Yes — PEG | A PEG-based emulsifier used to stabilize oil-in-water emulsions in creams and lotions. Contains a polyethylene glycol component. |
| Propylene Glycol? | Solvent/Humectant | ?Uncertain — Propylene Glycol | An organic compound used as a solvent and humectant. Can cause contact dermatitis in sensitive individuals. |
| .alpha.-tocopherol Acetate, Dl- | Antioxidant | No | Synthetic vitamin E acetate (racemic form). Used as an antioxidant to protect active ingredients from degradation. |
| .alpha.-tocopherol, Dl- | — | No | — |
| Butylene Glycol | Humectant/Solvent | No | A synthetic glycol used as a humectant and solvent in topical formulations. Helps products spread smoothly on skin. |
| Calcium Carbonate? | Filler/Antacid | No | Chalk. Used as a filler, coating whitener, and antacid. Also provides a source of calcium. |
| Ceteth-20 | — | No | — |
| Diazolidinyl Urea | Preservative | No | A formaldehyde-releasing preservative used to prevent microbial growth. Can cause contact dermatitis in formaldehyde-sensitive individuals. |
| Edetate Disodium | Chelating Agent | No | Also known as EDTA. Binds metal ions to prevent degradation of active ingredients and preserve product stability. |
| Ginger | Flavoring/Active | No | Ginger root extract used as a flavoring agent and for its anti-nausea properties. Generally well tolerated. |
| 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 Monostearate | Emulsifier | No | An emulsifier that helps oil and water mix in creams and ointments. Derived from glycerin and stearic acid. |
| Hamamelis Virginiana Top Water | Skin Conditioner | No | Witch hazel distillate, a plant-derived astringent used in topical formulations to soothe and tone the skin. |
| 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. |
| Levomenthol? | Counterirritant/Flavoring | No | The natural isomer of menthol. Produces a cooling sensation and is used as a counterirritant and flavoring agent. |
| Maltodextrin | Filler/Binder | No | A starch-derived carbohydrate used as a filler, binder, and coating agent. Typically derived from corn — may be relevant for corn-sensitive individuals. |
| Mineral Oil | Emollient/Vehicle | No | A purified petroleum-derived oil used as an emollient and vehicle in topical formulations and as a lubricant in oral laxatives. |
| Niacinamide | Skin Conditioner | No | Vitamin B3 (nicotinamide). Used as a skin-conditioning agent in topical formulations. Generally well tolerated. |
| Petrolatum | Emollient/Barrier | No | Petroleum jelly (Vaseline). Used as a skin protectant, emollient, and ointment base in topical formulations. |
| Phenazopyridine Hydrochloride | — | No | — |
| Phenoxyethanol | Preservative | No | A synthetic preservative used to prevent microbial growth in topical and some oral formulations. Can cause skin irritation in sensitive individuals. |
| Safflower Oil | Emollient/Vehicle | No | A plant-derived oil used as an emollient and vehicle in topical and oral formulations. |
| Silicon Dioxide | Glidant | No | A mineral (silica) used to improve powder flow during tablet manufacturing. Also called colloidal silicon dioxide. |
| Sodium Phosphate, Dibasic | Buffer | No | A phosphate salt used as a buffering agent to maintain alkaline pH in pharmaceutical solutions. |
| Sodium Tripolyphosphate? | — | No | — |
| Stearic Acid | Lubricant | No | A fatty acid used as a lubricant in tablet manufacturing. |
| Trolamine | Emulsifier/pH Adjuster | No | Triethanolamine. Used as an emulsifier and pH adjuster in topical creams and lotions. |