However, some experiments proved the ineffectiveness of carbon dioxide treatment in stuttering. The neuroleptics are antipsychotic drugs that affect the psychomotor activity. Fortunately, they do not have hypnotic effects nor are sleep-inducing agents. Examples of neuroleptics used in treating stuttering are thioridaxine, trifluoperazine, and haloperidol. The Bates Appliance is more complicated that deals with many forms of stuttering. Another example is the Idehara Stutter-Cure, consisting of a retainer-like metal forms and a whistle to encourage continuous airflow when speaking. Another type of devise provides visual and production to help stutterers identify and change their speech production as part of their therapies. The sessions aim to develop a self-acceptance and love in the patients. The fundamental emphasis on this technique is to embed in patients belief system that everyone has freedom to think, feel, and behave. This stage is focused on embedding new beliefs, thoughts, feelings, attitude, and behaviour on an internal level. If the person has been suffering from this case for more than six months, they must undergo thorough evaluation to be performed by a professional speech language pathologist. You can also consult such even if the patient is a preschooler, but if the condition is not bothering them, you can wait if they will be able to outgrow this. The program s exercises aid the stutterers to focus their attention away from the activity. This results to simplified language development process and as such becomes subconscious. Stutterers also learn an uncontrolled speech muscles and makes articulation an automatic process at a rapid rate. It also aimed at making the patients fully understand their speech production system so that they can self-correct their errors. To know more and understand what stammering is and how it is manifested in children and adults, you have to learn the symptoms of this speech condition. Learning the symptoms enables you to take immediate actions once you have confirmed that you have speech disfluency. Problems with speech production are the first symptoms of stammering.