I have always obtained my antibiotics from CalVetSupply dot com THESE ARE THE EXACT SAME ANTIBIOTICS AS YOU'D GET FROM WALGREENS! HOW DO I KNOW THIS? I had an abscessed tooth and did not have the ability to take off work, I asked my sister if she had any clindamycin and she sent me some she had gotten from her local pharmacy At the same time I ordered a bottle from CalVetSupply I got both packages the same day. The pills my sister sent were identical color and imprinted numbers as the ones from the veterinary supply! The reason for this is BOTH are made in the same lab! The government requires the same testing for veterinary medicines as it does for humans! NEVER purchase antibiotics from foreign countries!!! They are NOT tested like US veterinary & human medicines are I cannot remember who does the tests now because I'm trying to think about it. UL? It can be found on things like peroxide though Derrrrrrrr it's on the label! It is "USP Certified" USP Certifications guarantee that 1.) it is what it says it is 2.) that the dosage ( Mg. ) is what it says it is This is NOT done in medicines ordered from over seas! I see that Clindamycin is on backorder 😞 https://www.calvetsupply.com/aquarium-clindamycin-150mg-100-capsules.html