There are three main brands of Imiquimod cream and generic Imiquimod is also available. These different brands contain different strengths of Imiquimod and are combined with different ingredients.:
Aldara: 5% Imiquimod [also contains benzyl alcohol, cetyl alcohol, methylparaben, propylparaben, sorbitan monostearate(sorbitan stearate)]
Zyclara: 3.75 Imiquimod [also contains benzyl alcohol, cetyl alcohol, methylparaben, propylparaben]
Zyclara Pump: 2.5%-3.75% Imiquimod  [also contains benzyl alcohol, cetyl alcohol, methylparaben, propylparaben]
Generic Imiquimod: 3.75%-5% Imiquimod [different generic versions of Imiquimod may contain different additional ingredients]