medications

Hey guys was just wondering about some medications. my husband had back surgery a while back. he's on the medications tramadol (250mg a day) gabapentin (1600mg a day) and indomethacin (100mg a day) our family doctor says that won't hurt trying to conceive but I have read online that it does and that it doesn't. does anyone really know?! and can this hurt the baby once I become pregnant and we continue to have intercourse while these are in his system?