Diclectin making me sooo tired!!

Hey ladies! My doctor prescribed me diclectin for my nausea because it was happening morning till night! I've only been taking it for 2 days now and it is helping the nausea but I am extremely tired and drowsy on it. It's to the point that I can't get off the couch and am worried that I won't be alert enough to work. Anyone with experience on diclectin does your body eventually get used to it? I'm lowering how much I take to hopefully let myself ease into it