I take baclofen and deal with nausea, but can't say it is related. It comes and goes... and I have pancreatitis. So, who knows the actual cause for me.

Sorry I could not be more help.

I can only take oral baclofen in low doses (20mg or less at a time). Any higher and I am nauseous and dizzy and totally useless. I do take oral baclofen daily (10 mg) and have a baclofen pump with this combo I have no side effects.

No, I never had problem with this. Are you sure it's from Baclofen?

I found the following regarding side effects of baclofen. It looks like nausea is one of them.

What are the possible side effects of baclofen?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have any of these serious side effects:
seizure (convulsions);
confusion, hallucinations; or
an uneven heartbeat.

Less serious baclofen side effects may include:
drowsiness, dizziness, weakness, tired feeling;
headache;
sleep problems (insomnia);
nausea, constipation; or
urinating more often than usual.

Hope this helps! Best of luck to you!

I take it 3 times a day. So far no problems with it.