Common Sleepiness, Orthostatic hypotension (sudden lowering of blood pressure on standing), Dryness in mouth, Abnormality of voluntary movements, Parkinsonism, Weight gain, Akathisia, Dystonia, Constipation.

Expert advice for Halopac Capsule

Do not start or continue loxapine and consult your doctor if you have history of fits (seizures), heart or brain related diseases, respiratory or lung problems, or if you are pregnant, planning to become pregnant, or are breastfeeding.
Do not drive or operate any machinery because you may feel sleepy or dizzy while being treated with loxapine.

Q. Is Halopac or Halopac succinate an atypical antipsychotic or narcotic drug?
Halopac or Halopac succinate is not an atypical antipsychotic or narcotic drug. It is a dibenzoxazepine typical antipsychotic

Q. Does Halopac cause weight gain, diabetes, or tiredness?
Halopac may cause weight gain or tiredness, but it is not known to cause diabetes.