Testosterone replacement therapy is one of the most common reasons a men's health practice works with a compounding pharmacy, and it is also the category with the most moving parts: a Schedule III controlled substance, FDA-approved comparators, state-by-state pharmacy licensing and a refill cadence that keeps patients coming back. ScriptLinkRx is built to run that workflow end to end, from an EPCS-signed prescription to a refill six months later, with licensed compounding pharmacies doing the dispensing.
Testosterone is a controlled substance first
Every form of testosterone, including compounded injections, creams and gels, is a Schedule III controlled substance under the Controlled Substances Act. That sets the baseline for everything else:
- DEA registration. Only a prescriber with a current DEA registration can prescribe it, and the registration must cover the state where the prescription is issued.
- EPCS rules. An electronic prescription for a controlled substance must be created and signed in a system that meets DEA's EPCS requirements, after the prescriber has completed identity proofing and two-factor authentication.
- Refill limits. Schedule III prescriptions may be refilled up to five times within six months of the date written. After that the prescriber issues a new prescription.
- Records. Pharmacies and, for office stock, clinics must keep controlled-substance receipt and dispensing records.
ScriptLinkRx handles the prescribing side through its DoseSpot e-prescribing integration. Prescribers complete EPCS enrollment once, then sign controlled-substance prescriptions electronically as part of placing an order. Practice administrators can see which prescribers have finished EPCS setup.
Patient-specific TRT orders (503A)
Most TRT prescriptions are patient-specific and go to a 503A compounding pharmacy. On ScriptLinkRx that looks like:
- Select the patient. The catalog filters to pharmacies licensed in the patient's state.
- Choose the formulation. Partner pharmacies list their own testosterone products, with strength, dosage form, pack size and price.
- E-prescribe. The prescriber signs the prescription through EPCS; the order and prescription go to the pharmacy together.
- Pay and track. Clinic-pay or patient-pay, then order status and shipping tracking in one place.
- Refill. Refills run from the same order record and go back through EPCS, so the prescriber keeps control of every dispense.
Which forms partner pharmacies prepare
Compounding pharmacies prepare testosterone on a prescriber's order in forms and strengths that are not commercially available. The exact list is set by each pharmacy and shown in the catalog, but the categories clinics ask about most are:
- Injectable testosterone cypionate or enanthate in alternative carrier oils, for patients who react to a commercial excipient or need a different concentration.
- Topical creams and gels in strengths outside the approved products' range.
- Other dosage forms a pharmacy offers on request.
ScriptLinkRx does not pre-select or recommend a formulation. The prescriber chooses; the pharmacy compounds to the prescription.
Essentially a copy: where compounded TRT sits
Because FDA-approved testosterone products exist, compounded testosterone is squarely within the FDA's "essentially a copy" rules. For a 503A pharmacy, a compounded product with the same active ingredient, a similar strength and the same route as an approved product is treated as essentially a copy unless the prescriber determines, and documents on the prescription, a change that produces a significant difference for that patient. A pharmacy also may not compound essentially copies regularly or in inordinate amounts.
What that means for a clinic:
- The clinical reason for the compounded product belongs in the chart and on the prescription, patient by patient. A standing note applied to every TRT patient does not meet the standard; the FDA's 2026 enforcement actions on compounded GLP-1s made the point that templated justifications and high volume read as pretext.
- Where an approved product would serve the patient, prescribe the approved product.
- Pharmacies on the network are responsible for their own compliance with the copy restriction and may decline a prescription that does not document a difference.
Office-use testosterone (503B)
Clinics that administer injections on site can source office-use testosterone from a 503B outsourcing facility on the network, after completing the facility's enrollment. Office stock of a controlled substance adds requirements beyond ordinary 503B office use: the practice needs its own DEA registration to receive and store it, DEA record-keeping for receipt and administration, and compliance with state rules on office stock. The 503B office-use ordering guide covers enrollment and the state-law questions in more detail.
Licensing across states
Telehealth-based TRT practices treat patients in several states, and a pharmacy may only ship into states where it holds an active license. Partner pharmacies on ScriptLinkRx record their licensed states, and the catalog only shows what can ship to the selected patient, so a practice with patients in several states does not have to maintain that matrix by hand. The prescriber's own licensing and DEA registration in the patient's state remain the prescriber's responsibility.