Do discount codes stack?

Do discount codes stack?

Also asked: promo code, coupon, discount, referral credit, code not working Answer: Usually not. Multi-vial and multi-month packages already have the discount built into the price, so a promo code generally won't apply on top. Single-month plans are where codes are most likely to work.

If a code is rejected at checkout, message us before paying and we'll tell you what applies to your plan.