Pharmacy Opening Stock: How to Decide What to Order Before You Have Sales Data

Your pharmacy opening stock is the biggest single bill you will pay before you sell anything. Buy too much and cash sits on shelves while expiry dates tick. Buy too little and the first patients leave empty-handed and may not return. With no sales history, the usual advice to order what sells is no help at all. This guide shows a practical way to decide, using public methods rather than guesswork.

You will see how to build a first range from clinic demand and national lists, how to rank items by value with ABC analysis, and how to set minimum and maximum levels with a simple formula. Every worked example is invented to show the method, so replace the numbers with your own.

Why pharmacy opening stock needs its own plan

Normal reordering relies on sales history. On day one you have none, so every quantity is a guess. That is why the first order is where most owners overspend. The risk is not only cash. Unsold stock expires, and expired stock is a direct loss.

A good first plan does three things. It covers the lines that patients will certainly ask for. It limits quantities on lines you are unsure about. And it builds in a review after the first two to three months, when real sales replace your estimates.

Step 1: start from demand, not from a catalogue

A supplier catalogue lists thousands of products. Do not begin there. Begin with who will walk in. Ask the nearby clinics which medicines they prescribe most. Note the common local illnesses and the season you open in. Walk the nearest competitors and see what they stock and what they price.

Write a one-page demand sheet. For each likely line, record the generic name, form and strength, and your best guess of weekly demand. Mark each as certain, likely or uncertain. Your first order should cover the certain lines fully, the likely lines partly and the uncertain lines lightly or not at all.

Step 2: use national lists as a baseline, not a shopping list

National essential medicines lists help you check that you have not forgotten something important. The WHO Model List, 24th edition, published in September 2025, contains 523 medicines, up from 502, with 20 added and 3 removed. India's 2022 National List of Essential Medicines has 384 medicines in 27 therapeutic categories.

These lists were written for public-sector care. A retail pharmacy needs many more over-the-counter lines and fewer hospital-only products. Use the list to cross-check your range, not to build it.

Step 3: rank items by value with ABC analysis

ABC analysis sorts items by how much money they use in a year. The Management Sciences for Health manual describes it clearly. Class A items are about 10 to 20% of lines and about 75 to 80% of spend. Class B is about 10 to 20% of lines and 15 to 20% of spend. Class C is 60 to 80% of lines and only 5 to 10% of spend.

You can only rank real data, so for a new shop use your demand sheet and supplier prices to estimate annual value. The table below is invented. It shows ten items, ranked by assumed annual value in thousands of rupees.

With ten items the shares are rough, and a real list has hundreds of lines, so the proportions tighten. The use is the same. Spend the most care on class A, keep a leaner stock on class C, and review class B regularly.

Step 4: add a second ranking for importance

Value is not the same as importance. A cheap item can matter a great deal if running out harms a patient. The Management Sciences for Health chapter describes a vital, essential and non-essential ranking, often shortened to VEN, for exactly this reason. Indian papers use a similar vital, essential and desirable scheme.

Cross the two rankings. A class C item that is vital, such as an oral rehydration product, should never run out, even though it uses little money. A class A item that is non-essential can be ordered in smaller lots. This simple grid tells you what never to run out of and what you can trim when cash is tight.

Step 5: set minimum and maximum levels with a formula

A minimum and a maximum give you a rule for each line, so ordering becomes a routine. The Management Sciences for Health manual gives the standard formulas. Minimum stock equals lead time times average monthly use, plus safety stock. Maximum stock equals the minimum plus the review period times average monthly use.

The manual's own example uses a two-month lead time, 1,000 units a month, 2,000 units of safety stock and a six-month cycle, giving a minimum of 4,000 and a maximum of 10,000. A pharmacy works on shorter cycles. Here is an invented example for one product.

The manual also mentions a multiplier of 1.5 on safety stock for vital items with variable demand. Use it where running out would be serious.

A worked example: building a first range for one clinic

Imagine a pharmacy opening beside a small clinic with three doctors. Every number here is invented to show the steps, so use your own. You visit the clinic and learn that about 60 patients a day attend and roughly half leave with a prescription. That is about 30 prescriptions a day, or 900 a month.

You ask the doctors for their ten most common prescriptions and note that a handful of antibiotics, pain relief and acid-reducing medicines dominate. You list those as certain lines and order about two weeks of expected use. You list skin creams and eye drops as likely lines and order one week. You list rare lines as uncertain and order the smallest pack or none, and you agree that the supplier will deliver within two days if a patient asks.

After the first month you replace the guesses with sales, adjust the numbers and repeat. That is the whole method. The aim of your pharmacy opening stock is to learn fast without tying up cash, and a plan like this does that.

Ordering with no history: a practical approach

The manual says little about the case with no history, beyond using judgemental estimates from staff and advice from others. So this part is our own suggestion, not a sourced rule. Estimate demand from nearby clinic prescribing and your supplier's advice, use a short lead time, order small, and replace estimates with real sales within two to three months.

The manual does give one useful warning. Stock-outs hide demand, because a product that is out of stock cannot sell. When you review your first months, adjust the use figure for any days a product was unavailable, or you will keep under-ordering it.

Fridge lines and cold-chain stock

Some of your most important lines need a fridge. WHO guidance sets 2 to 8 C for refrigerated products, and a sound routine includes backup power for the fridge, a digital thermometer with an alarm and twice-daily temperature logs. Before you order insulin, vaccines or similar lines, check that your fridge, power supply and logging routine are ready.

Start with a small fridge range, sized to your fridge and to the demand you can confirm with the clinic. Cold-chain lines are costly to lose, because a power failure can spoil the whole shelf. Order little and often until you know your sales, and agree with the supplier how a failed delivery is handled.

Season, illness patterns and opening date

Demand is not flat through the year. Ask the clinic what illnesses rise in the season you open, and what the school calendar and holidays do to footfall. A pharmacy that opens just before a busy season needs more of the relevant lines, and one that opens in a quiet period can order less and learn more.

Do not rely on a general belief about seasons. Use what the clinic and the nearby competitors tell you, and record your own sales from day one. After a full year you will have a record that is worth more than any outside guide.

Splitting the first order across suppliers

Do not place the whole first order with one business. Give your main supplier the core range, and ask a second supplier for the lines the first cannot supply. Compare prices on the class A items, because a small gain there matters most.

Spread delivery dates too. Ask for the core range to arrive just before inspection or opening, and for slower lines to arrive later. That keeps cash free for longer and reduces the time stock sits on the shelf. For checks on each business, see how to choose a pharmacy supplier.

Mix, margin and cash

Your product mix will shape cash. In the US, nearly 96% of independent pharmacy sales are prescriptions. A paid commercial report for India puts prescriptions at about 70% of pharmacy retail and over-the-counter at 30%. We found no verified split for African markets, so measure your own after the first month.

A practitioner article in Drug Topics gives about 15 inventory turns a year as a benchmark and says that moving from 10 to 12 turns can free up $15,000 to $60,000 of working capital. That is a US practitioner view, so test it. The cash tied up in your pharmacy opening stock is cash you cannot spend on rent, pay or fit-out.

Rules that protect you from expiry

A few habits stop the first order turning into a loss. Receive stock by batch and expiry from day one. Shelve by first expiry, first out. Refuse short-dated stock unless the supplier agrees to take it back. Set an alert at ninety days before expiry, and move slow lines to a sale or return before the date.

A system that records batch and expiry makes this routine. Synapse tracks batches with expiry alerts and records returns with credit notes and automatic restocking, and you can start free and see it live. See how to reduce expired stock in a pharmacy for a full playbook.

Mistakes to avoid with your first order

These errors are common, and each is easy to avoid with a plan.

• Ordering from a catalogue instead of from clinic demand
• Buying a full range of slow items to make shelves look full
• Taking short-dated stock because the price is low
• Placing one huge order instead of a core order and a later top-up
• Forgetting fridge capacity, so cold-chain stock cannot be stored
• Skipping the review after two to three months

Full shelves look good on opening day, but they are not the goal. The goal is the right lines in the right quantities, with cash left to adjust.

Your first-order checklist

Before you place the order, run through this short list.

• Demand sheet written, with each line marked certain, likely or uncertain
• Cross-checked against the national essential medicines list
• ABC and vital-essential rankings done for the main lines
• Minimum and maximum set for the top lines
• Supplier licences checked, and terms and returns agreed
• Review booked for two to three months after opening

For the whole launch, see how to open a pharmacy. For the lists referenced here, visit WHO.