. ▁formula ▁change ▁ ▁The ▁original ▁formula ▁for ▁Act if ed ▁contained ▁pseudo e ph ed r ine ▁hydro ch lor ide ▁ 6 0   m g ▁as ▁the ▁nas al ▁de con gest ant ▁and ▁tri pro l id ine ▁hydro ch lor ide ▁ 2 . 5   m g ▁as ▁the ▁anti h ist am ine . ▁ ▁However , ▁in ▁response ▁to ▁w ides p read ▁laws ▁requiring ▁products ▁containing ▁pseudo e ph ed r ine ▁to ▁be ▁kept ▁behind ▁the ▁ph arm acy ▁counter , ▁Pf izer ▁changed ▁Act if ed ' s ▁U . S . ▁formula ▁in ▁late ▁ 2 0 0 6 ▁to ▁contain ▁phen yle phr ine ▁H Cl ▁ 1 0   m g ▁as ▁the ▁nas al ▁de con gest ant ▁and ▁ch lor phen ir am ine ▁male ate ▁ 4   m g ▁as ▁the ▁anti h ist am ine . ▁ ▁Many ▁users ▁of ▁the ▁old ▁formula ▁have ▁compla ined ▁that ▁the ▁new ▁formula ▁is ▁not ▁as ▁effective ▁at ▁rel ieving ▁their ▁sympt oms . ▁ ▁Other ▁br ands ▁available ▁behind ▁the ▁counter ▁that ▁use ▁the ▁old ▁formula ▁include ▁Gen ac ▁and ▁A prod ine . ▁The ▁American ▁ph arm acy ▁chain ▁Wal gre ens ▁produced ▁a ▁house - brand ▁version ▁of ▁Act if ed , ▁Wal - Act , ▁which ▁used ▁the ▁original ▁pseudo e ph ed r ine / tri pro l id ine ▁formula . ▁ ▁In ▁the ▁UK , ▁Germany , ▁Italy , ▁and