Relezin is a prescription medication containing 4 mg of Tizanidine per tablet, available in a package of 30 tablets. This pharmaceutical product is manufactured by United Pharmaceuticals, part of MS Pharma. Relezin contains the active ingredient Tizanidine in a 4 mg dosage strength. The package contains 30 tablets and is manufactured by United Pharmaceuticals, which is part of MS Pharma. As this is a prescription medication, it should only be taken under the direction and supervision of a healthcare provider.