After taking Zolcalm-10 Tablet (Melatonin 3 mg + Zolpidem 10 mg), you should aim for at least 6 to 8 hours of uninterrupted sleep for it to work effectively and to avoid next-day drowsiness or dizziness. The exact duration may vary from person to person depending on factors like age, overall health, other medications, and individual sensitivity to the drug.