Is there any safe prescription or anything that can be done for irritable bowel syndrome-constipation while breastfeeding my 7 month old?

Certainly. Increasing evidence suggests that the use of "probiotics" has been found to assist in the normalization of many sufferers of ibs. Probiotics would not be harmful during breast feeding. Additionally, during bouts of constipation, polyethylene glycol (aka miralax) is commonly used for constipation in pediatrics; therefore, use by you should not pose a problem while breastfeeding. Both avaiable otc.