Eh veloxin memang boleh buat drowsy and dizzy macam tu, especially punya first time makan, a few of mums I know complained pasal yang sama, mata berat and rasa floating je hari tu haha. But kalau effect dia extend until next morning macam tu, better you check with your doctor or pharmacist, could be you need lower dose or different medication yang suits you better, sebab normally the drowsiness should wear off by next day. Some of my mum friends switch to ginger supplements or peppermint instead kalau the side effects tu too much, tapi definitely worth discussing dengan your doc first