Severe pain possible anal fissure w/some bleeding for 5 months. Miralax (polyethylene glycol) softened too much. Citrucel = fissure pain back. OK to alternate both meds?

Several possibls. First you can reduce the dose of MiraLAX (polyethylene glycol) to whatever level it needs to be to prevent you from being loose. You can also used scheduled emptying to be sure the lower bowel stays as empty as possible for as long as needed to heal. Twice a day works for most.Avoid the foods that plug like apples, pasta, bananas, and enjoy fruits that loosen if it helps.(Peaches,plums,prunes)
Anal Fistila. Absolutely anything that works should be used. The idea is to let stool pass through the normal route and avoid any constipation so the fistula tract stays empty . .