Schedule 3 and 4 medicine – prescription rules
The practical difference between Schedule 3 and Schedule 4 medicine in South Africa, plus the checks that prevent unsafe repeat use.
Schedules 3 and 4 are prescription-controlled
Schedule 3 and Schedule 4 medicines are not ordinary self-care products. A prescriber chooses them for a clinical reason, and the pharmacy supplies them under the applicable prescription and legal conditions. The schedule does not tell you whether a medicine is right for your current symptom or how long you should continue it.
Why a repeat is not automatic
A medicine that was prescribed for a previous infection, pain episode or flare may be wrong for a new problem. The diagnosis, other medicines, organ function and monitoring needs can all be different.
- Keep the original prescription and follow its duration.
- Do not lend tablets, use a family member's repeats or save leftovers for later.
- Ask the prescriber or pharmacist before changing the timing, stopping early or restarting.
- Bring the actual box when a pharmacy needs to identify a product.
Make a prescription safer to follow
- Read the active ingredient, strength, directions and duration before leaving the pharmacy.
- Ask what to do if you miss a dose or vomit after taking it.
- Record the medicine in one list with your other treatment.
- Book or attend the follow-up the prescriber requested.
Never self-start someone else's prescription
Common questions
- Does Schedule 3 always need a prescription?
- Schedule 3 is prescription-controlled in South Africa. The exact approved conditions still matter, so a pharmacist or prescriber should answer product-specific questions.
- What is the difference between Schedule 3 and Schedule 4?
- Both are prescription schedules, but their legal controls and approved conditions differ. Use the current SAHPRA record for the exact medicine rather than treating the numbers as a strength scale.
Sources
- Medicines and Related Substances Act 101 of 1965, and SAHPRA scheduling guidanceSouth African Health Products Regulatory Authority
- Medicines Online Directory and approved patient information leafletsSouth African Health Products Regulatory Authority
- Primary Healthcare Standard Treatment Guidelines and Essential Medicines ListNational Department of Health, South Africa
Last reviewed 26 August 2026.