Alavert and Claridin D?

I have really bad allergies and lately i been taking Alavert 24 which only has Loratadine 10mg (which is antihistamine), but im also congested so today i bought claritin D which also has loratadine 5mg ( which is antihistamine) and also has pseudoephedrine sulfate 120 mg (which is nasal decongestant), this morning around 8:30 AM i took one pill of ALAVERT 24hour, so my question is can i take claritin D (by the way claritin D is the 12hour one) tonight around 1030 PM??? will it do anything?