Start with patient demand, not shelf count
A GLP-1 reorder forecast should begin with active patient demand. The question is not only how many vials are on hand. It is how many patients are expected to refill, titrate, pause, restart, or move into a higher dose tier before the next order arrives.
A cabinet count can look comfortable while the forward demand curve is already out of balance. Ten patients moving from starter doses into higher medication requirements can change the economics of the next two weeks even if today's inventory count looks normal.
Forecast demand by dose tier
GLP-1 clinics should separate expected usage by dose tier, protocol, concentration, and medication source. Starter, titration, and maintenance patients do not create the same medication draw, and they should not be forecast as one blended average.
The practical forecast compares active patients at each tier, scheduled refill timing, expected titration moves, and the usable quantity left in each lot. That gives operators a forward view of medication demand before the team has to place an urgent order.
Add lead time and safety stock
A reorder point should include supplier lead time plus safety stock. Lead time is the number of days between placing an order and having usable medication available in the clinic. Safety stock is the cushion for late shipments, appointment spikes, dose changes, new starts, and provider schedule shifts.
Safety stock should be deliberate. Too little creates stockout risk and rescheduling pressure. Too much can tie up cash in inventory that may expire before enough profitable visits consume it.
Do not forecast usable inventory from gross inventory
Not every unit on hand is equally useful. Lots close to expiration, opened vials, patient-specific allocations, damaged stock, and concentration differences all change what can actually be used for upcoming visits.
A strong GLP-1 forecast separates gross quantity from usable quantity. It also enforces FEFO behavior, so first-expiring product is consumed first and new orders do not bury medication that already carries expiration risk.
Connect reorders to margin
The cheapest order is not always the most profitable order. Volume discounts, vendor minimums, shipping economics, cold-chain handling, expiration dating, and cash position all matter. A clinic can save on unit cost and still lose margin if the order creates waste.
Reorder decisions should show the expected margin impact by dose tier and service model. When medication cost rises, patients titrate, or pricing stays flat, the order forecast should make margin pressure visible before it becomes a monthly surprise.
Review the forecast weekly
For GLP-1 and medical weight loss clinics, weekly review is usually the minimum operating cadence. Operators should look at active patient count, scheduled refills, upcoming dose changes, stockouts, expiring lots, waste, open orders, supplier lead time, and margin by tier.
Otzaro turns reorder forecasting into an operating view instead of a spreadsheet exercise. Medication usage, lot inventory, expiration risk, COGS, provider activity, and dose-tier margin stay connected so owners can order with control.
A useful GLP-1 reorder forecast should include
Active patients and scheduled refills by medication, protocol, and dose tier.
Usable inventory by lot, expiration date, concentration, and remaining quantity.
Supplier lead time plus safety stock based on demand volatility and stockout cost.
Expected margin impact before a reorder creates waste, cash drag, or dose-tier compression.
FAQ
How often should GLP-1 clinics forecast medication reorders?
Most GLP-1 clinics should review reorder forecasts weekly because patient dose changes, refill timing, lead time, and expiration risk can move quickly. Higher-volume clinics may need more frequent checks around shipment days and provider schedules.
What causes GLP-1 stockouts?
Common causes include forecasting from current shelf count instead of active patient demand, ignoring titration into higher dose tiers, underestimating supplier lead time, and failing to reserve safety stock for refill spikes or delayed shipments.
Can GLP-1 reorder forecasting reduce expired medication?
Yes. Forecasting helps operators compare expected dose-tier demand against expiration dates before they buy more medication. Combined with FEFO rotation, it reduces the chance that older lots sit unused behind newer stock.