<<Disclaimer: Verify this information before applying it to your situation.>> This site is helpful when you need to contact a drug manufacturer-- http://www.pharmacytimes.com/ Just click on the "Generic" capsule to find a long list of companies and contact information. If you shop at Walgreens you can check out their site to get information the the suppliers of their drugs https://www.walgreens.com/ Look for 'Drug Information" (When I needed a prescription for amoxicillin filled, the information I needed was on the label of the large drug bottle. The pharmacist couldn't seem to find it--just didn't know what he was looking for. He gave me the label to read but had torn it off at the ingredient listing! Since you can't call a drug company after business hours, it often pays to check the label first.) Bev in Milwaukee