There is no dependency on Botox for spastic strabismus, but usually one shot only lasts about 4 months, so repeated injections over a long period of time are needed for long term relief. The effect of botulinum toxin in treating spasmodic cervical obliquity is relatively good, and the onset of effect time is also fast, but hitting once can only maintain about 4, usually need long-term repeated injections in order to achieve long-term relief. However, long-term injection of Botox will cause side effects such as dry mouth, neck weakness, pain at the injection site, and individual patients will also have difficulty in swallowing. Although Botox injections do not produce dependence, it is still not recommended that patients inject Botox on their own, they should inject Botox as needed under the guidance of a professional physician, and seek immediate medical attention if discomfort occurs.