Oxy-Powder does not typically cause muscle spasms when taken as directed, around 2-3 times weekly, to address occasional constipation. If you have excessive bowel movements the day after taking Oxy-Powder, consider reducing your serving size by 1-2 capsules. If you still experience muscle issues, you can try using ORMUS Earth Minerals or IntraMIN, which is an excellent source of trace minerals and electrolytes. Here you have more details: https://globalhealing.com/products/intramin. If you need further assistance, please feel free to contact us at 800.476.0016.