I am suffering from ankylosing spondylitis and it was diagnosed a year before. My doctor has advised me to be on Dulane 20 mg once every night since then. Whenever I miss one dose, the next morning and the whole day is horrific to me in terms of experience. I face extreme dizziness, vertigo type and can't focus on anything else other than this. I am 24 years and I am worried about how to stop this. Should I continuously take the Dulane 20 mg or plan to stop it? If I stop taking, how to overcome this dizziness problem? Or any other major side effects to be aware of in the near future. Please help.