UnboundLocalError: local variable ' ' referenced before assignment

[d3fi]

I just cant find the problem here. I have searched for it. but that did not solve my problem.

def fentanyl():    # This one Works
    vaegt = int(input("Hvad vejer patienten? "))
    max_dosis = vaegt * 4
    max_volumen = vaegt * 4 * 2 / 100
    print(f"Du må max total give ptt. {max_dosis} mikrogram, sv. {max_volumen} ml")
    mk_kg = float(input("Hvor mange mikrogram pr. kg. vil du give?  "))
    mk_kg *= vaegt
    dosis = mk_kg * 2 / 100
    print(f"Du skal give {mk_kg} mikrogram")
    print(f"Du skal give {dosis} ml.")

def adrenalin(): #this does not work
    vaegt = int(input("Hvad vejer patienten? "))
    tilbage = vaegt % 5
    vaegt -= tilbage
    if tilbage > 2:
        vaegt += 5
        dosis = vaegt * 0.01
    if vaegt >= 50:
        print("Du skal give 0.5 mg, sv. 0.5 ml!")
    else:
        print(f"Du skal give {dosis} mg, sv. {dosis} ml!")    # It says here that UnboundLocalError: local variable 'dosis' referenced before assignment

def midazolam():    # This does not Work
    vaegt = int(input("Hvad vejer patienten? "))
    tilbage = vaegt % 5
    vaegt -= tilbage
    if tilbage > 2:
        vaegt += 5  #### problemer når den udregner med præcis 13 kg!!!!!!!!!!!!!! #Only note to myself, dont think about this
    dosis = vaegt * 0.2
    ml = dosis * 2 / 10
    if vaegt >= 50:
        print("Giv 10 mg, sv. 2 ml intranasalt!")
    else:
        print(f"Du skal give {dosis} mg, sv. {ml} ml!")

medicin = (input("Hvilken medicin vil du give? "))     
if medicin.lower() in ("fentanyl", "fen", "fenta", "fe"):
    fentanyl()
elif medicin.lower() in ("adrenalin", "ad", "adre"):
    adrenalin()
elif medicin.lower() in ("midazolam", "mi", "mida"):
    midazolam()