<unk>  is used to relieve pain caused by muscle injuries like strains and sprains in combination with rest and physical therapy. A 2004 review found fair evidence that<unk>  is effective for acute back or neck pain, but found insufficient evidence to establish the relative efficacy of the drug in relation to other drugs in the study.<unk>  and other muscle relaxants are sometimes used to treat pain arising from rheumatoid arthritis but there is no evidence they are effective for that purpose. A 2003 Cochrane Review of the use of anticholinergic drugs to improve motor function in Parkinson's disease found that as a class, the drugs are useful for that purpose; it identified one single-site randomised, cross-over study of<unk>  vs placebo. Although<unk>  and other anticholinergics have largely been superseded by other drugs; they have a use in alleviating motor function symptoms, and appear to help about 20% of people with Parkinson's.
Orphenadrine
Halofantrine
Oxymetazoline
Erythrocrine
Acebutolol
Acetomepregenol
Minaprine
Hyoscine butylbromide