L-Tryptophan
(2S)-2-Amino-3-(1H-indol-3-yl)propanoic acid
Drag to rotate. Structure from PubChem CID 6305.
Background
Listing
- Schedules
- Schedule 1 to 5, conditions apply
- Exceptions reach
- Schedule 0
- Source
- Consolidated Schedules 06 July 2026
Registered medicines
The ingredient index links no registered medicine to L-Tryptophan (register of 13 September 2026).
Counted through the register's ingredient index, which does not reach every record.
Regulatory status
Where S1 to S5 sits on the scale
Depends on which listing applies
At the least restrictive, Schedule 1: sold by a pharmacist, no doctor's prescription needed. At the most restrictive, Schedule 5: prescription-only, with tighter controls on repeats. The listings below say which applies to which form, strength or pack size.
Schedule S1 to S5, as the Consolidated Schedules list it.
Who may supply: A pharmacist dispensing against a written or verbal prescription from an authorised prescriber; a veterinarian, who may also prescribe, compound or dispense it directly; a medical practitioner or dentist, who may prescribe it and may compound or dispense it directly only if licensed under section 22C(1)(a); manufacturers and wholesalers may supply people who may lawfully possess it.
Consolidated Schedules listings for L-tryptophan
S5: L-Tryptophan
- except in oral preparations with a maximum daily dose not exceeding 220 mg of L-tryptophan, alone or in combination with other active pharmaceutical ingredients; (S1)
- except in oral preparation with a maximum daily dose not exceeding 220 mg of L-tryptophan alone or in combination with other active pharmaceutical ingredients, with general health claims as a health supplement;(S0)
Consolidated Schedules 06 July 2026, lines 9750 to 9757
S1: L-Tryptophan
- in oral preparations with a maximum daily dose not exceeding 220 mg of L-tryptophan, alone or in combination with other active pharmaceutical ingredients; (S5)
- except in oral preparation with a maximum daily dose not exceeding 220 mg of L-tryptophan alone or in combination with other active pharmaceutical ingredients, with general health claims as a health supplement. (S0)
Consolidated Schedules 06 July 2026, lines 1127 to 1140
This is an informational summary of the Medicines and Related Substances Act 101 of 1965 and its 2017 General Regulations. It is not medical advice and not legal advice. Always check the medicine's label, which carries the schedule number inside a square border, or ask a pharmacist if you are unsure.