The names of symbols for receptors for medicines and other mediators have not been standardised. Follow NC-IUPHAR terminology, where possible. Follow the rules in this section for the medicine component, and add alphanumeric descriptors, as required. For simple Greek-letter descriptors, it is generally better to give the name of the letter in full rather than using the Greek letter:

If the prefix is further qualified, however, it may be preferable to include the Greek letter and use subscripts:

Similarly for other descriptors: