Quel 400mg Tablet SR can be taken with or without food However it is recommended to take it at the same time every day in order to maintain a consistent level of medication in the body Follow your doctors instructions regarding the dosage and duration of treatment If you happen to miss a dose take it as soon as you remember It is important not to abruptly stop this medication without consulting your doctor as it may worsen your symptoms However if you experience symptoms of Neuroleptic malignant syndrome NMS such as fever muscle rigidity altered consciousness or seizures discontinue the medicine immediately Some common side effects of this medication include headache dry mouth and constipation Initially it may cause a sudden drop in blood pressure when changing positions so it is advisable to rise slowly if you have been sitting or lying down It may also cause dizziness and drowsiness so avoid activities that require mental focus such as driving until you know how the medication affects you This medication may lead to weight gain but making lifestyle modifications such as maintaining a healthy diet and regular exercise can help reduce this side effect Use this medication with caution as it may increase the risk of developing diabetes Regularly monitor your glucose levels and inform your doctor if you experience any unusual changes in mood or behavior new or worsening depression or suicidal thoughts while taking this medication