1. What Is Invega?
Invega is a prescription medication that can work in the brain to treat schizoaffective disorder and schizophrenia. It is also known as an atypical antipsychotic or second-generation antipsychotic. The drug can help restore the balance of serotonin and dopamine, important neurotransmitters for regulating behavior, mood, and thinking. The following symptoms can be relieved by Invega: delusions, hallucinations, a lack of motivation, difficulty speaking clearly, reduced social desire, disorganized thinking, depression, hopelessness, loss of pleasure or interest in normal activities, low energy, irritability, and many other mental issues. 
2. How Long Does Invega Take to Work?
After the first few weeks of taking Invega, it is important to inform your doctor about your symptoms and improvements. In general, it often takes a couple of weeks for the drug to take full effect. During this period, your healthcare provider needs to monitor your conditions and decide whether the drug is suitable for you. People with schizophrenia might need antipsychotic treatment lifelong. The duration of treatment can vary, depending on the illness and symptoms:
– Delusions, disorganized thinking, and hallucinations might improve in the first 1 or 2 weeks
– Desire and motivation could improve at least after 1 or 2 weeks
– The longer you take Invega, the better the symptoms would be
– It often takes around 2 to 3 months before the full effect of Invega takes place 
3. Common Side Effects
Invega would cause the following common side effects:
– Allergies: Invega might trigger allergic reactions, which can be characterized by difficulty breathing, wheezing, vomiting, nausea, headache, and many more.
– Pediatric: While there is still a lack of proper research on the effects of Invega on children, it is not recommended to use this drug on them to reduce the risk of some serious health issues.
– Breastfeeding: Taking Invega when you are breastfeeding would post some risks to your babies. Make sure to consult your doctor before starting. 
4. Rare Side Effects
Invega might increase blood levels of prolactin, a type of hormone. This would lead to some side effects like losing sex drive or erectile issues in men and losing period or reduced production of breast milk in women. In the long run, elevated prolactin would result in osteoporosis and increase the risk of bone fractures. Some patients would have side effects related to muscles when taking Invega. These include stiffness, tremor, restlessness, and jerky or slow movements in the mouth. 
5. Risks in The Long Term
Taking Invega in the long run would increase the risk of tardive dyskinesia. Typical symptoms of this condition include smacking, sucking, and grimacing of lips, as well as other movements that you would not control. It is important to inform your healthcare provider as soon as you notice these signs. In addition, some other side effects with prolonged use of Invega include high triglycerides, high cholesterol, weight gain, and diabetes.
6. Risks during Pregnancy
If you are planning to become pregnant, make sure to inform your doctor to get the best advice on your medications. Those people with schizophrenia who want to become pregnant might have to make important decisions. Untreated schizophrenia would pose several risks to the fetus and mother. It is necessary to discuss the benefits and possible side effects of the medication before starting.
Taking Invega during the third trimester would increase the risk of abnormal muscle movements or withdrawal issues in newborn babies after birth. These include feeding disorder, agitation, hypotonia, hypertonia, somnolence, respiratory distress, as well as tremor. In some serious cases, these problems might need hospitalization. Breastfeeding mothers should also be cautious because Invega would pass into breast milk.