Another way to evaluate it, is what are the risks? Are they considered minimal? Some times it's a matter of timing things, like Purrrsiankitty said.
I just checked these two sites using the two meds you spoke of - Buspar and Motrin - and found no interactions:/www.drugs.com/interactions-check.php?drug_list=441-206,1310-780
"Patients receiving busPIRone should preferably avoid the consumption of large amounts of grapefruits and grapefruit juice. If this is not possible, the busPIRone dose should be taken at least 2 hours before or 8 hours after grapefruit or grapefruit juice. Large amounts of grapefruit and grapefruit juice may cause increased levels of busPIRone in your body. "www.rxlist.com/drug-interaction-checker.htm
This one listed no interactions between those two meds.
When in doubt, ask an experience Pharmacy tech or your doctor.
Herb only treatment for Lyme & Bart ended 12/11 - no active symptoms for 2 yrs -Herb only treatment for Babesia ended 12/12www.healingwell.com/community/default.aspx?f=30&m=2977364
Had Lyme, Bart, Babs, RMSF, Ehrlichia, Myco, Anaplasmosis, EBV
New Lyme case 8/2014 - Healed 1/31/15 - unknowingly had Asymptomatic Babs and Asymptomatic Bart, being treated now though (2/2016)