BiltRx vs Arc-1: Where to Get Tirzepatide Online

BiltRx and Arc-1 are the two verified compounded tirzepatide providers on this site. BiltRx charges a flat $129 per month with consultation and shipping billed separately. Arc-1 prices by dose tier from $199.99 to $399.99 with everything included. This comparison covers every verifiable difference: pricing, formulation, consultation process, shipping, state coverage and our editorial assessment.

Quick Comparison Table

Pricing Breakdown

Price is the first thing most buyers compare. BiltRx wins on published medication cost. Arc-1 wins on all-inclusive pricing transparency.

BiltRx Monthly Cost

BiltRx advertises $129 per month for compounded tirzepatide at any prescribed dose. This is the medication cost only. The consultation fee and shipping fee are billed separately. BiltRx does not publish exact amounts for either on its product page. For patients who want the lowest base medication price, BiltRx delivers. The unknown extras are the caveat.

Arc-1 Dose-Tiered Pricing

Arc-1 publishes the full cost on its product page: $199.99 (2.5 mg), $249.99 (5 mg), $399.99 (7.5 mg). These include consultation, medication and expedited shipping. No hidden fees. The trade-off is a higher starting price, and the cost increases with each dose escalation.

At BiltRx's flat rate, higher doses become proportionally cheaper per milligram than Arc-1. At the lowest dose, the gap between the two is smallest. A patient who expects to escalate to 7.5 mg saves substantially on medication cost with BiltRx, assuming the undisclosed extras do not close the gap.

Formulation Differences

The medication itself differs between the two providers.

BiltRx: Tirzepatide Only

BiltRx compounds tirzepatide without additional active ingredients. The formulation is straightforward: tirzepatide in injectable form, prepared by a US 503A pharmacy. BiltRx does not publish the concentration (mg/mL) on its product page. The prescribing provider determines the concentration and dose.

Arc-1: Tirzepatide + Glycine + B12

Arc-1's formulation adds glycine (5 mg/mL) and vitamin B12 (500 mcg/mL) to tirzepatide (10 mg/mL). Glycine is an amino acid involved in cellular repair and collagen synthesis. B12 supports energy production and red blood cell formation. Whether these additions provide meaningful clinical benefit alongside tirzepatide has not been studied in controlled trials. They are commonly supplemented ingredients, but their value in this specific combination is not established by published data.

Consultation and Prescribing

Both providers require a medical consultation. The process and cost differ.

BiltRx Consultation Process

BiltRx uses an integrated telehealth platform. Patients complete a health intake form, which is reviewed by a licensed US provider. The provider evaluates clinical appropriateness, screens for contraindications and prescribes if approved. The consultation fee is separate from the $129 medication price. BiltRx also mentions weight-loss coaching support and ongoing provider access as part of the platform.

Arc-1 Consultation Process

Arc-1 routes the consultation through board-certified physicians in their network. The intake form is completed after checkout. The medical review is free. If the provider determines tirzepatide is not appropriate, the patient is not charged for medication. Arc-1 does not mention weight-loss coaching or ongoing support beyond the prescribing relationship.

Shipping and Delivery

BiltRx Shipping

BiltRx charges shipping separately. The exact fee is not published. Medication ships in temperature-controlled packaging from the partner 503A pharmacy. Delivery timelines are not specified on the product page.

Arc-1 Free Expedited Shipping

Arc-1 includes free expedited shipping in the medication price. Delivery is described as "discreet" on the product page. The 503A pharmacy ships the medication directly to the patient. Specific delivery timelines are not published, but "expedited" typically means 2-5 business days for pharmaceutical shipments.

State Availability

This is a practical differentiator. If your state is restricted by one provider, your choice is made for you.

Arc-1 Restricted States

Arc-1 does not serve five states: California, Arkansas, Indiana, Minnesota and South Carolina. This is due to the combination of telehealth prescribing regulations and pharmacy shipping rules in those jurisdictions. If you are in one of these states, BiltRx is your compounded option (pending their own state availability check) or you can pursue brand-name tirzepatide through a local provider.

Our Verdict

Both providers are legitimate, LegitScript certified, and use US 503A pharmacies. The right choice depends on what matters most to you.

Best for Lowest Monthly Cost

BiltRx at $129 per month (medication only). The flat rate does not increase with dose escalation. The caveat: consultation and shipping fees are extra and undisclosed. If you are comfortable with that uncertainty, BiltRx is the cheapest medication option.

Best for Transparent Dose Pricing

Arc-1. Every cost is published on the product page. $199.99 at 2.5 mg, $249.99 at 5 mg, $399.99 at 7.5 mg. No hidden fees. If you want to know exactly what you will pay before starting, Arc-1 is more transparent.

Best for Included Extras

Arc-1. Free consultation, free shipping, glycine and B12 in the formulation, 30-day satisfaction guarantee. BiltRx does not offer any of these at the published medication price. The all-inclusive model simplifies budgeting.