Pharmacy and Apothecary
Why This Matters
Herbal medicine gives you the raw materials. Pharmacy transforms them into standardized, reproducible, storable medicines with known doses. The difference between “chew some willow bark” and “take 300 mg of salicylic acid extract every 6 hours” is the difference between folk guessing and effective treatment. A functioning pharmacy saves lives by ensuring the right medicine reaches the right patient in the right dose at the right time.
Setting Up a Dispensary
Essential Equipment
You need a clean, dry, well-lit room dedicated to medicine preparation and storage. At minimum:
| Equipment | Purpose | How to Make/Obtain |
|---|---|---|
| Mortar and pestle | Grinding dried herbs and minerals | Carved stone (granite preferred) |
| Balance scale | Weighing precise doses | Beam balance with known weights (stones calibrated against each other) |
| Glass or ceramic jars | Storage of medicines | Fired pottery with tight-fitting lids |
| Cutting board and knife | Processing fresh plant material | Hardwood board, steel blade |
| Straining cloth | Filtering extracts | Tightly woven linen or cotton |
| Funnel | Transferring liquids | Rolled bark or sheet metal cone |
| Measuring cups/spoons | Consistent volumes | Carved wood or fired clay, calibrated against your scale |
| Distillation apparatus | Essential oils and purification | See Alcohol and Distillation |
| Labels | Identifying every container | Paper or parchment with ink; always label IMMEDIATELY |
| Record book | Tracking prescriptions and outcomes | Bound paper with ink |
Organization
Step 1 — Assign every medicine a dedicated jar. Never mix medicines in the same container. Label every jar with: the medicine name, date of preparation, and strength/concentration.
Step 2 — Organize by category: internal medicines separate from external, poisons separate from safe preparations, fresh materials separate from dried.
Step 3 — Keep the dispensary clean. Sweep daily. Wash all equipment immediately after use. Contamination — even trace amounts of one medicine in another — can cause unexpected and dangerous effects.
Warning
The most dangerous mistake in pharmacy is mislabeling. A jar of belladonna tincture labeled “chamomile” will kill someone. Label every container immediately upon filling it. Never work with more than one substance at a time. Clean all equipment between preparations. This is not excessive caution — it is the minimum standard that prevents death.
Extraction Methods
Infusion (Tea)
The simplest extraction. Hot water draws water-soluble compounds from plant material.
Step 1 — Measure the dried herb. Standard ratio: 1 tablespoon (roughly 3-5 grams) of dried herb per 250 ml of water.
Step 2 — Pour boiling water over the herb. Cover (essential — volatile compounds escape with steam if uncovered). Steep for 10-15 minutes.
Step 3 — Strain through cloth. Drink while warm (within 4-6 hours; infusions spoil quickly).
Best for: Leaves and flowers (chamomile, mint, linden, elderflower).
Decoction
Harder plant materials (bark, roots, seeds) need sustained boiling to release their compounds.
Step 1 — Chop or crush the material into small pieces. Measure: 1 tablespoon per 350 ml of water (extra water compensates for evaporation).
Step 2 — Place in a pot with cold water. Bring to a gentle boil. Simmer covered for 20-40 minutes.
Step 3 — Strain. Can be stored for 48-72 hours if kept cool and covered.
Best for: Willow bark, cinchona bark, marshmallow root, valerian root.
Tincture
Alcohol extracts both water-soluble and oil-soluble compounds, producing a concentrated, long-lasting medicine.
Step 1 — Chop the herb finely. Pack it into a clean glass or ceramic jar, filling it roughly halfway.
Step 2 — Cover completely with alcohol. Use the strongest distilled spirit available — at least 40 percent alcohol (80 proof). Higher is better for resinous herbs. Seal the jar tightly.
Step 3 — Store in a cool, dark place. Shake the jar once daily for 2-6 weeks. The alcohol will change color as it extracts compounds.
Step 4 — Strain through cloth, squeezing the plant material to extract all liquid. Bottle the tincture in dark glass if available. Label with: herb name, alcohol percentage, date started, date strained.
Shelf life: Tinctures remain potent for 3-5 years or longer if stored in a cool, dark place.
Dosage: Tinctures are concentrated. Standard adult dose is 1-5 ml (20-100 drops) diluted in water, 2-3 times daily. Specific doses depend on the herb — see individual entries in your pharmacopoeia.
Tip
Tinctures are your most important preparation. They are concentrated, stable, portable, and precisely dosable. A well-stocked pharmacy has tinctures of all commonly used herbs ready at all times.
Poultice
Direct application of plant material to skin for wounds, inflammation, and pain.
Step 1 — Crush or mash fresh herb into a paste (or reconstitute dried herb with a small amount of hot water).
Step 2 — Apply the paste directly to the affected area, 1-2 cm thick.
Step 3 — Cover with a cloth bandage to hold it in place. Leave for 1-4 hours. Replace with fresh poultice 2-3 times daily.
Best for: Plantain leaf (wound healing, insect bites), comfrey (sprains, bruises — external only), clay (drawing infections).
Dosage Calculation
The most critical skill in pharmacy. Too little medicine has no effect. Too much is poison. Every medicine has a therapeutic window — the range between the minimum effective dose and the toxic dose.
Weight-Based Dosing
Adults vary in size. A 50 kg person needs a different dose than a 90 kg person.
Standard approach: Establish a dose per kilogram of body weight. If a herb is effective at 50 mg per kg body weight per day:
- 50 kg adult: 2,500 mg (2.5 grams) per day
- 70 kg adult: 3,500 mg (3.5 grams) per day
- 90 kg adult: 4,500 mg (4.5 grams) per day
Divide the daily dose into 3-4 equal portions taken throughout the day.
Adjusting for Age
Children are NOT small adults. Their bodies process drugs differently.
| Age Group | Fraction of Adult Dose | Rule |
|---|---|---|
| Infant (0-1 year) | DO NOT dose | Most medicines are unsafe for infants; use only with extreme caution and known-safe herbs |
| Toddler (1-3 years) | 1/6 to 1/4 of adult dose | Use only mild, well-established herbs (chamomile, elderflower) |
| Child (4-8 years) | 1/4 to 1/3 of adult dose | Can use most herbs at reduced dose |
| Older child (9-14) | 1/2 of adult dose | Approaching adult tolerance |
| Elderly (65+) | 1/2 to 3/4 of adult dose | Slower metabolism; start low |
| Pregnant women | EXTREME caution | Many herbs cause miscarriage; avoid all but known-safe preparations |
Warning
Herbs that cause uterine contractions are absolutely contraindicated in pregnancy. These include: pennyroyal, tansy, mugwort, blue cohosh, rue, and large doses of parsley. Keep a list of pregnancy-unsafe herbs posted prominently in your dispensary.
The Therapeutic Window
For each medicine in your pharmacopoeia, record three numbers:
- Minimum effective dose — below this, the medicine does nothing
- Standard dose — the usual amount that produces the desired effect
- Maximum safe dose — above this, toxic effects begin
The wider the gap between effective and toxic doses, the safer the medicine. Chamomile tea has a very wide window (nearly impossible to overdose). Foxglove (digitalis) has a very narrow window (effective dose is close to lethal dose).
Dosage Forms
Pills and Tablets
Step 1 — Grind the dried herb or extract to a very fine powder using mortar and pestle.
Step 2 — Mix with a binder to form a dough. Common binders:
- Honey (excellent binder, pleasant taste, mild preservative)
- Gum arabic dissolved in water
- Flour paste (less effective but universally available)
Step 3 — Roll the dough into small balls of consistent size. A standard pill is roughly 5-8 mm in diameter (about the size of a pea).
Step 4 — Weigh a batch of pills and count them to verify each pill contains the intended dose. If 10 pills weigh 5 grams total, each contains 500 mg.
Step 5 — Dry the pills in shade until firm. Store in a labeled jar. Shelf life: 6-12 months for honey-bound pills, less for flour-based.
Tip
Coat bitter pills with a thin layer of beeswax to make them easier to swallow. Melt beeswax, dip each pill briefly, and let cool on a smooth surface.
Salves and Ointments
For topical application — wounds, rashes, muscle pain, skin conditions.
Step 1 — Infuse your herb into oil. Place dried herb in a jar and cover with olive oil, linseed oil, or animal fat. Let sit for 4-6 weeks in a warm place, shaking daily. Alternatively, gently heat the oil-and-herb mixture at very low temperature (below 60 C) for 4-6 hours. Strain.
Step 2 — Melt beeswax — roughly 25-30 grams of beeswax per 250 ml of infused oil. More wax = firmer salve. Less wax = softer ointment.
Step 3 — Combine the melted wax with the warm infused oil. Stir continuously. Pour into small jars before it sets.
Step 4 — Test consistency when cool. Too firm? Remelt and add more oil. Too soft? Remelt and add more wax.
Shelf life: 6-12 months. Discard if the salve smells rancid or changes color.
Suppositories
For patients who cannot swallow (unconscious, vomiting) or for local treatment of hemorrhoids and rectal conditions.
Step 1 — Melt cocoa butter, beeswax, or animal fat. These solidify at body temperature but melt at body-internal temperature (37 C).
Step 2 — Mix in the powdered medicine at the desired dose.
Step 3 — Pour into small molds (roll aluminum foil into finger-sized tubes, or use carved wooden molds). Let solidify.
Step 4 — Store in a cool place. Insert as needed. The body heat melts the suppository and the medicine is absorbed through the rectal lining.
Syrups
Honey or sugar-based liquid medicines. Excellent for children, coughs, and sore throats.
Step 1 — Prepare a strong decoction or infusion of the herb (double strength — use twice the usual herb amount).
Step 2 — Strain thoroughly. Measure the liquid volume.
Step 3 — Add honey or sugar: 1.5 to 2 parts honey per 1 part liquid. Heat gently and stir until completely dissolved. Do not boil (some compounds degrade at high temperature).
Step 4 — Bottle while warm. The high sugar concentration preserves the syrup for months. Label with herb name, date, and dosage instructions.
Essential Oil Distillation for Medicine
Essential oils are concentrated volatile compounds from aromatic plants. They are potent antimicrobials, analgesics, and antiseptics.
Steam Distillation
Step 1 — Set up your distillation apparatus: a sealed pot (retort), a condenser tube (copper or bamboo pipe running through cold water), and a collection vessel.
Step 2 — Place the aromatic herb (fresh or recently dried) on a grate above water in the retort. You want steam to pass through the plant material, not boil the herbs in water.
Step 3 — Heat the water to produce steam. Steam passes through the plant material, vaporizing the essential oils. The steam and oil vapors pass through the condenser, cool, and drip into the collection vessel.
Step 4 — In the collection vessel, the essential oil floats on top of the water (called “hydrosol” or “floral water”). Skim or siphon off the oil layer.
Yields are small. Expect 1-5 ml of essential oil from 1 kg of plant material, depending on the species. This is why essential oils are used in drops, not tablespoons.
Key Medicinal Essential Oils
| Oil | Source | Properties | Use |
|---|---|---|---|
| Thyme oil | Thyme leaves | Strong antiseptic, antifungal | Wound cleaning (dilute), throat gargle |
| Eucalyptus oil | Eucalyptus leaves | Decongestant, antiseptic | Steam inhalation for respiratory congestion |
| Peppermint oil | Peppermint leaves | Analgesic, antispasmodic | Diluted rub for headache, stomach cramps |
| Tea tree oil | Melaleuca leaves | Broad-spectrum antimicrobial | Wound treatment, skin infections (dilute) |
| Clove oil | Clove buds | Strong analgesic, antiseptic | Dental pain (apply directly to tooth) |
| Lavender oil | Lavender flowers | Mild antiseptic, calming | Burns, minor wounds, sleep aid |
Warning
Essential oils are highly concentrated. NEVER take them internally undiluted. Even externally, most must be diluted in a carrier oil (olive oil, coconut oil) at a ratio of 2-5 drops per tablespoon of carrier oil. Undiluted essential oils can cause chemical burns on skin and fatal poisoning if swallowed.
Key Medicines You Can Make
Aspirin from Willow Bark (Salicylic Acid)
Willow bark contains salicin, which the body converts to salicylic acid — the same compound (in modified form) as aspirin. It reduces pain, fever, and inflammation.
Step 1 — Harvest bark from willow trees (Salix species) — the inner bark (cambium layer) is most potent. Peel strips from branches, not the trunk (trunk stripping kills the tree). White willow (Salix alba) is most potent; any willow species works.
Step 2 — Dry the bark thoroughly in shade. Chop or grind to small pieces.
Step 3 — Prepare a decoction: simmer 2-3 tablespoons of dried bark in 500 ml of water for 20-30 minutes. Strain.
Dosage: 250 ml of decoction, 2-3 times daily for pain and fever. Effect is slower than modern aspirin (takes 30-60 minutes) but lasts longer.
Step 4 — For a stronger, more portable preparation, make a tincture (bark in alcohol for 4-6 weeks). Dose: 3-5 ml in water, 3 times daily.
Tip
Willow bark is gentler on the stomach than pure aspirin because it contains multiple buffering compounds alongside salicin. But it is still a blood thinner — avoid giving it to people with bleeding disorders, before surgery, or to children with viral fevers (risk of Reye syndrome).
Quinine from Cinchona Bark
Quinine treats malaria — the single deadliest disease in human history. If you have access to cinchona trees (native to South America but cultivated in tropical regions worldwide), this extraction is among the most valuable medicines you can produce.
Step 1 — Harvest bark from cinchona trees (Cinchona officinalis or related species). The bark is extremely bitter — this bitterness is the quinine.
Step 2 — Dry and grind the bark to powder.
Step 3 — Prepare a decoction: simmer 10 grams of powdered bark in 500 ml of water for 30 minutes. Strain. The resulting liquid is intensely bitter.
Step 4 — For tincture: soak 100 grams of bark in 500 ml of strong alcohol for 4-6 weeks. Strain.
Dosage for malaria treatment: 10-20 ml of tincture, 3 times daily for 7 days. Or 250 ml of decoction, 3 times daily. The key is consistent dosing for the full course — stopping early allows the parasite to survive and develop resistance.
Dosage for malaria prevention: 5-10 ml of tincture daily while in malaria-endemic areas.
Opiate Management
Opium poppies (Papaver somniferum) produce the most powerful pain relief available without modern chemistry. They are also the most dangerous medicine in your pharmacopoeia.
Preparation: Score the unripe seed pod with shallow cuts. A white latex oozes out and dries to a brown resin. This is raw opium. It contains morphine (pain relief), codeine (cough suppression), and other alkaloids.
Dosage: Raw opium varies enormously in potency depending on growing conditions, variety, and harvesting technique. This makes precise dosing extremely difficult.
- Start with a piece the size of a match head (approximately 30-50 mg of raw opium)
- Dissolve in warm water or alcohol
- Wait 30-60 minutes to assess effect before giving more
- NEVER give a second dose until the first has fully taken effect
| Use | Dosage Guidance | Duration |
|---|---|---|
| Moderate pain | Match-head size (30-50 mg raw opium) | Single dose; reassess |
| Severe pain (trauma, surgery) | Two match-head sizes | Repeat every 6-8 hours ONLY if needed |
| Cough suppression | Half match-head size | Every 8 hours; limit to 3 days |
| Diarrhea (dysentery) | Quarter match-head size | Single dose; slows gut motility |
Warning
Opium is lethally addictive. Physical dependence develops within 5-7 days of continuous use. Reserve opiates for severe pain only (broken bones, surgery, terminal illness). Never give to children under 12. Never give to unconscious or barely conscious patients. Never combine with alcohol. The lethal dose is only 3-5 times the therapeutic dose. Assign ONE person in your community to control the opium supply — do not allow self-administration.
Preserving Medicines
| Method | Best For | Shelf Life | Notes |
|---|---|---|---|
| Drying | Herbs, bark, roots | 1-2 years | Store in airtight jars away from light |
| Alcohol tincture | All herbs | 3-5+ years | Minimum 40% alcohol |
| Honey | Syrups, wound applications | 1-2 years | Honey itself never spoils |
| Oil infusion | Topical preparations | 6-12 months | Watch for rancidity |
| Beeswax sealing | Salves, pills | 6-12 months | Recheck periodically |
| Vinegar | Some herbs | 6-12 months | Less effective than alcohol |
Dangerous Interactions
Some herb combinations are harmful. Record these prominently in your pharmacopoeia:
| Combination | Danger |
|---|---|
| Willow bark + blood thinning herbs (garlic, ginger in high doses) | Excessive bleeding risk |
| Opiates + alcohol | Respiratory depression, death |
| Opiates + sedative herbs (valerian, hops) | Excessive sedation, death |
| Foxglove (digitalis) + any heart-affecting herb | Cardiac arrest |
| St. John’s wort + many other medicines | Reduces effectiveness of other drugs |
| Any uterine stimulant + pregnancy | Miscarriage |
| Multiple sedatives combined | Cumulative sedation, respiratory failure |
Building Your Pharmacopoeia
A pharmacopoeia is your community’s official drug reference guide. Every medicine you use gets a standardized entry.
Entry Format
For each medicine, document:
- Name (common and botanical)
- Part used (leaf, root, bark, seed, whole plant)
- Preparation method (infusion, decoction, tincture, oil, salve)
- Standard dose (with weight-based adjustments)
- Maximum safe dose (with toxic symptoms listed)
- Indications (what conditions it treats)
- Contraindications (who should NOT take it: pregnant women, children, liver disease, etc.)
- Side effects (expected effects beyond the therapeutic goal)
- Interactions (dangerous combinations)
- Outcome records (how many patients treated, results, failures)
Outcome Tracking
After every treatment, record:
- Patient (age, weight, condition)
- Medicine given (name, dose, frequency, duration)
- Outcome (cured, improved, no change, worsened, died)
- Side effects observed
- Notes for future use
This turns your pharmacy from guesswork into evidence-based medicine. After 50 treatments with willow bark for fever, you will know your local bark’s true effective dose, typical response time, and failure rate.
What’s Next
With a functioning pharmacy, advance to:
- Antibiotics — apply your extraction and culture skills to grow and produce antimicrobial compounds
- Organic Chemistry — understand the molecular basis of the medicines you are preparing
Pharmacy and Apothecary -- At a Glance
Four Core Extraction Methods:
Method Solvent Best For Shelf Life Infusion Water (hot) Leaves, flowers Hours Decoction Water (boiled) Bark, roots 2-3 days Tincture Alcohol (40%+) All herbs 3-5 years Oil infusion Fat/oil Topical use 6-12 months Dosage Rules:
- Calculate by body weight (mg per kg)
- Children: 1/4 to 1/2 adult dose depending on age
- Start low, increase gradually
- Record the therapeutic window for every medicine
Three Critical Medicines:
- Willow bark (salicylic acid) — pain, fever, inflammation
- Cinchona bark (quinine) — malaria treatment and prevention
- Opium poppy — severe pain ONLY, strict controls
Safety Non-Negotiables:
- Label every container immediately
- Never combine opiates with alcohol or sedatives
- Never give uterine stimulants to pregnant women
- One designated person controls opiate supply
- Record every prescription and outcome
Pharmacopoeia Entry Checklist: Name, part used, preparation, dose, max dose, indications, contraindications, side effects, interactions, outcomes