Obagi’s Clear Rx and Clear Fx can look like nearby choices within one product family, but the letters mark a consequential formula distinction. Clear Rx declares hydroquinone, while Clear Fx is the hydroquinone-free arbutin preparation. Tone & Trace reviews them together to make the difference visible, not to suggest that the two are interchangeable.

The manufacturer records, direct refund terms and FDA labeling context were checked on October 14, 2026. We did not obtain a prescription, buy either product or assess a pigment condition. This comparison follows the separate ingredient and purchase records and leaves personal treatment selection with the responsible professional.

Obagi Nu-Derm Clear Rx and Clear Fx: Clear Rx: 4% hydroquinone, Clear Fx: arbutin, no hydroquinone, Different access and purchase records
Editorial diagram of the published records and their limits. No product-use test or patient outcome is shown.

Clear Rx identifies a hydroquinone preparation

The manufacturer’s Clear Rx information declares 4% hydroquinone, equivalent to 40 mg per gram. That is a specific ingredient amount for the named prescription preparation. It should not be assigned to every Obagi brightening product or to a custom formula from another provider. [1]

The actual prescription and supplied package remain necessary to identify what a person receives. Our hydroquinone guide discusses the importance of access and product status separately from a cosmetic marketing category. This review provides no application amount, treatment duration or instruction to obtain a particular strength without an appropriate clinical assessment.

Related reading: A dark spot needs a name before a treatment

Clear Fx has a different active-ingredient story

Clear Fx is presented as the hydroquinone-free formula with arbutin. It is not simply the same hydroquinone product under a different name. The ingredient declaration should be kept attached to Fx throughout a comparison, including when a retailer groups several Nu-Derm items on one page. [2]

The absence of hydroquinone does not prove that Fx delivers the same outcome, acts through an identical formulation or is suitable for every reader who cannot use Rx. The ingredient-evidence guide explains why a shared brightening objective cannot make two different finished preparations clinically equivalent.

The range name is not a shared trial result

A product family may be marketed as a system, but that does not establish the independent effect of each item within it. Evidence for a hydroquinone preparation should not be transferred to an arbutin cosmetic, and a multi-step regimen result cannot automatically identify what one bottle contributes.

We did not independently appraise a full head-to-head study resolving the relative performance of the current Rx and Fx formulas. The melasma and post-acne guide also keeps different pigment concerns separate. No outcome percentage, universal response date or superiority score is supplied by this publication to fill that evidence gap.

Compare the options in top 5 dark spot creams & treatment options or read Hydroquinone prescriptions versus cosmetic serums.

The direct Fx price does not price a prescription

The checked direct listing displayed $125 for Clear Fx. That amount belongs to the identified retail formula and should not be quoted as the price of Clear Rx. A personal prescription, pharmacy inventory, insurance contribution and complete Rx charge were not established in this review. [1] [2]

We also did not complete an Fx checkout or verify address-specific taxes and shipping. The direct store’s $165 shipping threshold can matter to an order, but buying additional items changes the total commitment. A lower apparent shipping cost should not imply that a larger skincare system is medically required or that each extra product improves the result.

Cosmetic-store returns should not be borrowed for pharmacy dispensing

Obagi’s direct refund terms describe a thirty-day period from delivery, with eligibility conditions and exclusions. Samples are final sale, and shipping is not included in the refund promise. Those rules concern the applicable direct-store purchase and need to be checked against the actual item and order. [3]

They should not be assumed to govern a prescription dispensed through a pharmacy or another seller. This publication did not obtain authorization, mail a return or observe reimbursement. Keep the order agreement and responsible seller explicit when comparing the financial commitment, rather than assigning one brand-wide trial policy to every product carrying the Obagi name.

An ingredient distinction does not diagnose a dark spot

The FDA’s discussion of cosmetic labeling claims helps explain why intended use and claims matter; the familiar word brightening does not settle every product’s regulatory or clinical question. The manufacturer’s Rx and Fx records still need to be read individually rather than merged into one category. [4]

Our diagnosis guide places the identification of a skin concern before treatment selection. Pregnancy-related questions, other medicines, unexpected darkening or troublesome reactions warrant an appropriate professional discussion with the exact preparation identified. A retail listing and this comparison do not provide that assessment or authorize a change to existing care.

The comparison is useful when both identities remain visible

The public records support a clear distinction: named 4% hydroquinone in Clear Rx and a different hydroquinone-free arbutin formula in Clear Fx. They do not establish a common dose, an equal clinical effect or one universal purchase agreement. The personal prescription and actual selected order remain separate evidence.

The hydroquinone-safety guide provides further general context without setting a regimen. CoreAge Rx’s featured position on Tone & Trace is disclosed promotion and is not a clinical ranking against either Obagi preparation. This source-based review makes no claim of product testing, independent physician review or a patient outcome.

Sources and verification

Official pages establish product facts and provider claims. Clinical and regulatory sources answer separate evidence questions. Article checked October 14, 2026; individual source dates appear below. No medical reviewer is credited for this article.