Ordering Information 

Ordering Information

General Information

New accounts are always welcome! There are no minimum order requirements, and most orders placed before 2PM CST will be shipped the same day. Please note that prices are subject to change without notice.

Orders for Pharmaceutical Products

Sigma Pharmaceuticals ships products only within the United States and only to purchasers appropriately licensed in the United States. A state license number must be provided upon ordering. Sigma Pharmaceuticals, LLC assumes no liability for purchaser or user compliance with state laws or review of professional or product literature.


Sigma Pharmaceuticals accepts all major credit cards for payment.  Payment on invoice with Net 30 terms is available for accounts in good standing.  You can visit the Invoice Payment Portal on our website to pay an invoice with a credit card online. Automatic payments can also be made to a credit card.  Please contact our Customer Care Department at 800-779-3784 to arrange for automatic credit card payments.    

Delivery and Receipt

Sigma Pharmaceuticals, LLC is not liable for damages or loss resulting from delay of delivery. Contact our Customer Care Department at 1-800-779-3784 within thirty (30) days of receiving or discovering (when such defect was not visibly apparent upon receipt) damaged merchandise, but in no event later than ninety (90) days after receipt of the shipment. Claims for product shortage must be made within five (5) days of receipt of the shipment.

Return Policy

All returns require prior authorization. To obtain a Return Authorization Number, please contact our Customer Service Department at 800-779-3784 within thirty (30) days of receipt of the product to be returned, and we will be happy to assist you.

All merchandise must be returned unopened in its original packaging and must be in resalable condition.  A copy of the applicable invoice as well as the Return Authorization Number must be included with returned merchandise.

Please note that due to FDA regulations, we cannot accept returns of any prescription drug products that were not shipped in error by Sigma Pharmaceuticals. In addition, special order items and items sold at a discount because of short dating are not eligible for return. 

Approved returns should be sent to:

Sigma Pharmaceuticals, LLC
Attn: Returned Goods Department
955 236th St, Ste 1
North Liberty, IA 52317

Credit for returned merchandise will be issued only if such merchandise has been returned in accordance with this policy and only upon review by Sigma Pharmaceuticals of the products and quantities actually returned.  All returns should be packaged with care as Sigma Pharmaceuticals cannot accept responsibility for returned products that are damaged in transit. 

Sigma Pharmaceuticals retains complete discretion regarding returns of product not shipped in error by Sigma Pharmaceuticals.