The active ingredient gets most of the attention, but the vehicle it's delivered in changes how a topical medication actually performs: how occlusive it is, how it feels on the skin, and which body sites and skin conditions it suits best. See our skin absorption article for the mechanism behind why vehicle matters this much.
Vehicle Comparison
| Vehicle | Occlusivity | Best for | Notes |
|---|---|---|---|
| Ointment | High | Dry, thick, or lichenified skin; palms/soles | Greasy, poor cosmetic acceptability; least likely to sting on broken skin |
| Cream | Moderate | General use; intertriginous areas in a thinner cream | Contains preservatives/emulsifiers, occasional irritant or allergen source |
| Gel | Low | Scalp, hairy areas, acne-prone/oily skin | Can be drying or stinging on broken skin; fast-drying, non-greasy |
| Lotion | Low | Large body surface areas, hairy areas | Easy to spread thin; less occlusive than cream |
| Foam / Solution / Spray | Low | Scalp, large or hard-to-reach areas | High patient acceptability and adherence; often costs more |
Topical Drug Class Comparison
| Class | Primary use | Onset | Key counseling point |
|---|---|---|---|
| Corticosteroids | Inflammatory dermatoses | Days | Potency and duration limits; see our potency framework |
| Calcineurin inhibitors | Eczema, sensitive-area maintenance | Weeks | Steroid-sparing; transient burning on initial application is common |
| Retinoids | Acne, photoaging | Weeks to months | Start low and slow; see our retinoid counseling guide |
| Antifungals | Dermatophyte, candidal infections | 1–2 weeks | Complete the full course even after symptoms resolve |
| Antibacterials | Impetigo, infected lesions | Days | Distinguish true infection from colonization where possible |
| Antivirals | Herpes simplex, cold sores | Hours to days | Most effective when started at first prodromal symptoms |
This is an educational quick-reference chart and does not constitute medical or pharmaceutical advice. Product selection should always follow individualized clinical assessment and current prescribing information.