Your Patient Needs Compro — Now What?

You've written a prescription for Compro (Prochlorperazine 25 mg suppositories) because your patient needs an antiemetic they can actually absorb — they're vomiting too severely for oral medications. Two days later, the patient calls back: "My pharmacy doesn't have it. No one has it."

This scenario has become frustratingly common. Compro suppositories, while clinically valuable, occupy a niche in the pharmaceutical supply chain that makes consistent availability a challenge. As a provider, you can play a meaningful role in helping patients navigate these gaps — and in preventing them from becoming treatment interruptions.

This guide gives you practical strategies for helping your patients locate Compro, knowing when to pivot to alternatives, and building availability awareness into your prescribing workflow.

Current Availability: What's Happening with Compro

As of 2026, Compro suppositories are not in a formal FDA-listed shortage, but availability at the pharmacy counter remains inconsistent. The core issues:

• Very few manufacturers produce prochlorperazine suppositories — Padagis US LLC is the primary source for the Compro brand
• Pharmacies don't routinely stock suppositories — low turnover means many locations don't carry them on their shelves
• Injectable shortages create cascading demand — when hospitals can't source prochlorperazine injectable, demand shifts to other formulations
• Distributor-level gaps — even when the manufacturer is producing, individual pharmacy distributors may be temporarily out of stock

The oral tablets (5 mg and 10 mg) are generally available without significant difficulty. The supply challenge is specific to the suppository and injectable formulations.

Why Patients Can't Find It: Understanding the Barriers

When patients report they "can't find" Compro, they're typically encountering one of these barriers:

1. Pharmacy doesn't stock it: Many chain pharmacies (CVS, Walgreens, Rite Aid) don't carry suppository formulations as regular inventory items. The product isn't "out of stock" — it was never stocked.
2. Distributor backorder: The pharmacy is willing to order it, but their primary distributor is temporarily out. This can resolve in 24 to 72 hours but may take longer.
3. Brand vs. generic confusion: A pharmacy may not carry the Compro brand but may have generic prochlorperazine suppositories from a different manufacturer — and the patient may not realize to ask.
4. Geographic variation: Availability varies significantly by region and pharmacy density. Urban areas with more pharmacy options generally have better access than rural areas.

What Providers Can Do: 5 Practical Steps

Step 1: Direct Patients to Medfinder

Before your patient starts calling pharmacies at random, direct them to Medfinder. This tool lets patients search for medication availability by name and location, identifying which pharmacies near them currently have Compro or generic prochlorperazine suppositories in stock.

This single step can save patients hours of phone calls and reduce the risk that they give up and go without their antiemetic.

Step 2: Specify "Prochlorperazine Suppository" on the Prescription

When writing the prescription, include both the brand name (Compro) and the generic name (prochlorperazine 25 mg suppository). Also indicate on the prescription that generic substitution is permitted. This gives the pharmacist maximum flexibility to fill with whatever manufacturer's product is available.

Step 3: Recommend Independent Pharmacies

When chain pharmacies come up empty, independent pharmacies are often the solution. They typically:

• Have access to multiple wholesale distributors (not just one primary)
• Are more willing to special-order niche medications
• Can often source products within 24 to 48 hours that chains can't
• May have relationships with compounding pharmacies for backup

If you work with patients who frequently need suppository formulations, consider maintaining a short list of local independent pharmacies known for stocking or sourcing these products.

Step 4: Have Compounding as a Backup Plan

Compounding pharmacies can prepare prochlorperazine suppositories as a custom formulation when the commercial product is unavailable. This requires:

• A prescription written specifically for a compounded preparation
• Specifying the active ingredient (prochlorperazine), dose (typically 25 mg), and formulation (rectal suppository)
• The patient to identify a compounding pharmacy in their area (PCAB-accredited pharmacies are recommended)

Compounded suppositories may cost more than commercial products, but they provide a reliable fallback when supply is disrupted.

Step 5: Document Alternative Regimens in the Chart

For patients who depend on prochlorperazine suppositories, proactively document alternative antiemetic regimens in their chart. This way, if the patient calls in unable to find Compro, your team can quickly authorize a switch without requiring a full office visit. Useful alternatives to have ready:

• Promethazine 25 mg suppositories — closest pharmacological and formulation match
• Ondansetron 4-8 mg ODT — orally disintegrating tablet; doesn't require swallowing
• Metoclopramide 10 mg tablets — if oral route is feasible; note 12-week use limit
• Prochlorperazine 10 mg tablets — if oral route is feasible; same active ingredient

Therapeutic Alternatives: A Quick Reference

When Compro isn't available and the clinical situation requires an alternative:

• For patients who need a suppository: Promethazine (Phenergan) suppositories are the most direct substitute. Same drug class, widely available, similar efficacy for nausea/vomiting. More sedating than prochlorperazine.
• For patients who can use sublingual/ODT: Ondansetron ODT dissolves on the tongue and is absorbed without swallowing — a practical option even for actively nauseated patients.
• For gastroparesis-related nausea: Metoclopramide offers dual antiemetic and prokinetic effects. Be mindful of the FDA boxed warning for tardive dyskinesia with use beyond 12 weeks.
• For chemotherapy-induced nausea: Ondansetron or granisetron (including the Sancuso transdermal patch for extended coverage) are standard first-line options in oncology.

For a detailed comparison, see our Alternatives to Compro guide.

Workflow Tips for Your Practice

To minimize the impact of Compro availability issues on your patients and practice:

• Add availability notes to prescription instructions: Include a note like "If Compro is not available, patient may use generic prochlorperazine 25 mg suppository" to reduce pharmacy callbacks.
• Set up an alternatives protocol: Work with your nursing or MA team to create a standard protocol: if patient calls unable to fill Compro, staff can authorize switch to [documented alternative] without a provider visit.
• Include Medfinder in discharge/visit materials: Add the URL or QR code to patient handouts for medications with known availability challenges.
• Review suppository prescriptions quarterly: For patients on chronic antiemetic therapy, periodic review ensures the prescribed formulation is still the most accessible and appropriate option.

Final Thoughts

Compro availability is a supply chain problem, not a clinical one. The medication works. The challenge is getting it into your patient's hands. By directing patients to the right tools, building flexibility into your prescribing, and having documented alternatives ready, you can turn a supply chain headache into a manageable workflow step.

For the latest on Compro supply, see our provider shortage briefing. For patient-facing resources you can share, see How to Find Compro in Stock and How to Save Money on Compro.