Schizophrenia
In most cases,  antipsychotics are used to treat Schizophrenia.  In many cases, the patient is unwilling or unable to take the drug, so many of these drugs also exist in a form that can directly be injected using a syringe.  When used in combination with mental and social interventions (treatment), such injectable medication can help people to continue their treatment.   In many cases, the drugs need to be taken for 1-2 weeks before there is a visible, effect. For this reason, they need to be chosen carefully. Like other drugs, these drugs also have unwanted side effects.