That is incorrect. mg is milligrams, mcg is micrograms

While we are on the subject if you wish to better read your Rx's, here's a list of definitions.

abbreviation=English=Latin

ad.lib =freely as wanted=ad libitum
aq.=water=aqua
b.i.d.=twice a day=bis in die
cap.=capsule=capula
c with bar on top=with=cum
div.=divide=divide
eq.pts.=equal parts=equalis partis
gtt.=a drop=gutta
h.=hour=hora
no.=number=numero
O.=pint=octarius
p.r.n.=as occasion requires=pro re nata
q.s.=a sufficient quantity=quantum sufficiat
q4h=every 4 hours=quaque 4 hora
q6h=every 6 hours=quaque 6 hora
q1d=every day=quaque 1 die
q1w=every week
q.i.d.=four times a day=quater in die
s.i.d.=once a day=semel in die
Sig., or S.=write on the label=signa
stat.=immediately=statim
tab.=a tablet=tabella
t.i.d.=three times a day=ter in die

Weight

1000 picograms=1 nanogram (ng)
1000 nanograms =1 microgram (ug)
1000 micrograms=1 milligram (mg)
1000 milligrams=1 gram (g)
1000 grams=1 kilogram (kg)

Volume
1000 milliliters (ml)=1 liter (L)

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.