Is Cimetidina [INN-Spanish] Safe in Breastfeeding

I am a breastfeeding mother and i want to know if it is safe to use Cimetidina [INN-Spanish]? Is Cimetidina [INN-Spanish] safe for nursing mother and child? Does Cimetidina [INN-Spanish] extracts into breast milk? Does Cimetidina [INN-Spanish] has any long term or short term side effects on infants? Can Cimetidina [INN-Spanish] influence milk supply or can Cimetidina [INN-Spanish] decrease milk supply in lactating mothers?

No long-term adverse effects have been reported. However, it is excreted in large amounts into breast milk. American Academy of Pediatrics: Maternal Medication Usually Compatible With Breastfeeding.

Limited information indicates that maternal Cimetidina [INN-Spanish] results in infant dosages much less than those given directly to neonates. Cimetidina [INN-Spanish] would not be expected to cause any adverse effects in breastfed infants, especially if the infant is older than 2 months. However, because of its potential for causing hepatic enzyme inhibition, other drugs might be preferred.

Histamine H2-receptor blockade is known to stimulate prolactin secretion. In addition, Cimetidina [INN-Spanish] may have additional, nonspecific actions that stimulate prolactin secretion.[2] Oral Cimetidina [INN-Spanish] doses of 400 mg 4 times daily increased serum prolactin by 50 to 112% in 6 patients. Cimetidina [INN-Spanish] caused dose-related gynecomastia and galactorrhea in men and nonnursing women.[3][4][5] The prolactin level in a mother with established lactation may not affect her ability to breastfeed.