I riferimenti in rete sono veramente pochi, però questo è abbastanza indicativo:

Study CP047/07 This was a single centre, five-way open trial to assess the relative bioavailability, phsafety of multiple
NasalFent dose.
It was conducted in 13 healthy male and female volunteers. Five treatments regimes in the order listed below (‘dose escalation’), with a washout period between each regimen:
• Treatment A: Single dose of 100 μg PecFent (100 mcl) into the right nostril
• Treatment B: Two doses of 100 μg PecFent (2
• Treatment C: Two doses of 100 μg PecFent (2 x 100 mcl) 2 hours apart into the
• Treatment D: Two doses of 100 μg PecFent (2 x 100 mcl) 1 hour apart into the
• Treatment E: Eight doses of 100 μg PecFent (8 x 100 mcl) consecutively into the


Ho trovato poi quiwww.cosmopharmaceuticals.com/csm/news/...12.../2009-12-03it.pdf un riferimento autorevole a "quattro bracci di trattamento", quindi penso si possa dire anche "a cinque bracci di trattamento"