One single dose pharm.

[Natuli]

Each subject was randomised to one single dose of the Phase 2 formulation and one single dose of the Phase 3 formulation. One single dose of 1 mg Х, corresponding to 20 l = 2 clicks, administered subcutaneously in the abdomen in the evening, using a У needles.
Подскажите, пожалуйста, "One single dose" - именно One - "одну однократную дозу" -?
препарат в шприц-ручке

[Dimpassy]

одну разовую, хотя, на мой взгляд, "одну" здесь можно убрать

[Clea]

*одну разовую* +1

but since it could be 2 single doses, 3 single doses... etc. it's better, in my opinion, to keep "one"