Hello Sir/madam, I have been prescribed petril plus once at night and divalid er 250 twice. But i was feeling drowsy after taking divalid er twice, so neuro prescribed me 1/2 tablet of divalid er 250 once at night for 15 days. Then 1/2 tablet twice for 15 days. Then 1 tab and 1/2 tab twice for 15 days. And lastly 1 tab and 1 tab twice. So basically he has gradually increased the dose. Please docter help me to understand is the dosage ok. As my brother said the divalid er cannot be taken 1/2 (cannot be broken) Please suggest, i am confused