For temperature-sensitive medicines and medical parcels, transport is part of the product's controlled environment. The vehicle matters — but so do qualification, loading discipline, airflow, calibrated monitoring, chain of custody, route risk, handover and a defined response when something deviates.
Serious cold-chain work starts with the product's approved storage and transport conditions, not with whatever setting happens to be available on the refrigeration controller.
A medicine can be damaged by heat, but some products can also be damaged by freezing. Colder is not automatically safer.
The transport requirement should come from the product label, manufacturer or marketing-authorisation holder, supported by the client's SOPs and technical agreement. A 2–8°C lane therefore needs protection from both high-temperature excursions and localised cold spots.
This is why airflow, loading pattern, sensor position, door openings, preconditioning, route duration and the location of parcels relative to the evaporator matter. A temperature shown on the refrigeration unit is useful operational information, but it is not the same thing as an independent, traceable consignment temperature record.
The carrier's role is to execute the agreed transport process, preserve the evidence and escalate deviations. Product quality disposition belongs to the authorised quality function / Responsible Pharmacist — not the driver.
SAHPRA's Good Wholesaling Practice guideline defines multiple storage bands and treats cold chain as the complete set of materials, equipment, processes and procedures needed to maintain required conditions through the supply chain.
Where the product label specifies ambient control.
Controlled room-temperature distribution.
Requires its own defined control strategy.
The range addressed by Freshlink's current dedicated vehicle offer.
Specialised equipment; ultra-low can be around -70°C.
Transport sits between controlled environments. The risk is usually concentrated at the interfaces: staging, loading, multi-drop access, delays and receiving.
Correct product, correct destination, required temperature range and handling instructions confirmed before dispatch.
Vehicle condition checked, box at target condition, parcels positioned without blocking airflow or creating known hot/cold-spot exposure.
Temperature and vehicle location recorded for the journey; monitoring points based on the agreed validation or mapping approach.
Door openings, dwell time, route changes, security events and refrigeration alarms managed as quality risks — not just delivery inconveniences.
Consignee verified, delivery timestamped, condition checked and cold-chain stock moved promptly into the receiver's controlled environment.
POD, route history, temperature data and any deviations retained and made available according to the client's quality agreement.
A good transport process deliberately manages the conditions that cause excursions.
These concepts are often blurred in ordinary couriering. In pharmaceutical distribution, the distinction matters.
Evidence that premises, systems or equipment are capable of working correctly and producing the intended result.
Documented evidence that the process, when executed as defined, consistently achieves the required outcome.
Establishing the relationship between a measuring instrument and a known reference standard within defined acceptance limits.
“Medical” can describe anything from a registered medicine to a diagnostic specimen. Temperature is only one dimension; classification, packaging, security, traceability and authorised custody may be equally important.
| Parcel / product type | Key transport concern | What a carrier needs to know | Important boundary |
|---|---|---|---|
| Thermolabile medicines & vaccines | Often 2–8°C Heat and freeze exposure, excursion duration, secure custody. | Exact labelled conditions; delivery window; logger requirement; escalation contact; approved handover. | Excursion acceptability is product-specific and must be decided by the authorised quality / pharmacy function. |
| Biologics | High value, temperature sensitive, potentially narrow stability margins. | Product-specific range, handling restrictions, security level, delivery urgency and contingency. | Do not infer stability from another product with the same nominal temperature band. |
| Diagnostic reagents / IVDs | Storage conditions vary materially by product and kit component. | Manufacturer's storage conditions, whether components have different requirements, and allowed transit duration. | “Medical device” or “IVD” does not automatically mean 2–8°C. |
| Clinical-trial / investigational product | Protocol compliance, accountability, traceability, returns and reconciliation. | Protocol / pharmacy manual requirements, chain-of-custody steps, logger handling, return/quarantine process. | The transport SOP must fit the sponsor/CRO/site requirements — generic courier practice is not enough. |
| Human / animal specimens | Temperature plus biological-risk classification and packaging. | Whether exempt, Category B (e.g. UN3373) or Category A; shipper's packaging/marking; refrigerant used. | Infectious-substance transport is a separate compliance regime. Standard 2–8°C pharma transport does not automatically qualify a carrier to accept every specimen. |
| Scheduled / high-risk medicines | Security, authorised custody, documentation and theft/diversion risk. | Schedule, authorised parties, chain-of-custody and security requirements defined by the client. | Special legal and pharmacy controls may apply beyond temperature control. |
Current WHO guidance distinguishes infectious substances by risk category and uses specific UN numbers, packaging, marking, documentation and training requirements. For example, Category B biological substances are commonly assigned UN3373 and use a triple-packaging approach; higher-risk Category A substances follow stricter requirements. Dry ice also introduces its own dangerous-goods requirements. The shipper must classify and package correctly before a carrier accepts the consignment.
The correct response is to protect the product and the evidence first, then let the authorised quality function determine disposition using product-specific stability information.
A short spike, a low-temperature event, a door-open event and a prolonged refrigeration failure are not equivalent. Time, peak/minimum temperature, product location, packaging and product-specific stability all matter.
Alarm, logger or observation identifies a deviation or equipment issue.
Stabilise the environment and minimise additional exposure without creating a new risk.
Preserve raw temperature data, timestamps, route, door events and driver notes.
Escalate promptly to the named quality / Responsible Pharmacist contact in the SLA.
Establish duration, magnitude, likely cause and whether other consignments or process steps were affected.
Authorised quality personnel decide release, quarantine, return or rejection using product-specific information.
A quality-sensitive customer needs evidence that the right parcel moved through the right conditions, route and custody — and that exceptions are visible rather than hidden.
Monitoring is strongest when the sensor/logger is appropriate for the lane, in calibration, positioned according to the qualification strategy, time-synchronised and downloadable in a format that QA can review. A dashboard screenshot is not the same thing as a controlled data record.
Useful transport evidence links the consignment to the collection point, authorised driver/vehicle, route, temperature record, receiving party and final handover time. For higher-risk products, seals, parcel counts, ID checks and exception notes may also form part of the agreed chain.
SAHPRA explicitly expects delivery schedules and routes to consider local conditions and security risk. In Gauteng, that means building the lane around actual operating conditions rather than an ideal journey time.
High ambient temperatures increase heat ingress during loading, waiting and repeated door openings.
Traffic can turn a 45-minute planned leg into a multi-hour temperature-control and driver-hours problem.
Door-open frequency, parcel sequence and receiver readiness matter as much as kilometres travelled.
Route choice, unauthorised access, high-value loads and receiving delays must be designed into the SLA.
A realistic quote should describe the transport duty, not just the kilometres.
For a contracted transport lane, the commercial agreement alone is not enough. Quality responsibilities should be explicit: specifications, monitoring, calibration, security, deviation reporting, subcontracting, records, maintenance, audits and escalation.
This page is a practical explanation, not a substitute for a client's product-specific SOPs, regulatory obligations or professional quality decisions.
SAHPGL-INSP-03, Version 5. Covers contracts and SLAs, quality systems, validation, vehicles, controlled-temperature transport, monitoring, calibration, security, returns and traceability.
Open SAHPRA source →Guidance on construction checks, field shipment testing, temperature-probe placement, failure testing, documentation and calibration.
Open WHO supplement →Practical guidance on active/passive transport systems, loading, handling, monitoring and documentary evidence for time- and temperature-sensitive pharmaceuticals.
Open WHO supplement →Current guidance on classification, packaging, marking, labelling, documentation, refrigerants, roles and training for infectious-substance shipments.
Open WHO guidance →For a dedicated Pretoria / Gauteng pharmaceutical cold-chain subcontract, send us the collection point, delivery pattern, required temperature range, operating days and expected volume.
