Zithromax causing severe bloating and constipation

I’ve been on IV rocephin for 13 weeks. I didn’t have a problem with it. When I added IV Zithromax 500 mg I became severely constipated. I’m eating lots of fiber and taking supplements (magnesium oxide, pancreatin & ox bile, actigal, colon supports) but nothing is helping. Miralax doesn’t even help. So i’ve Been managing this side effect with colonics every week.
When my doctor took me off of zith the constipation went away. I decided I wanted to go back on it because it was helping my babesia symptoms.
Should I switch to doxycycline? Is that a good antibiotic for babesia? Or should I tough it out on the zith?
Why does Zithromax cause this side effect? Will it resolve itself eventually as my body gets used to it?

Get a quality probiotic that isn't too expensive like Nature's Way Primadophilus

Take 5 caps. If it doesn't work take 8 the next day. Doesn't work? Take 12 the next day. Sooner or later it will kick in.

Also it could be shutting down your liver. Taurine is a must, its a powerful liver protector, take 2 caps everytime you get a treatment. Hibiscus powder, milk thistle, and Gingko all protect the liver from pharmaceutical damage. Choline (lecithin) is also essential for a functioning liver.

A HIDA scan shows the flow of bile from the liver to the small intestine. You might want to ask your Doc about that to see if bile production is problem.

I can only say what works for me when I have die off related constipation and that the method I described, it may or may not work for someone else. VSL is too expensive to do this with thats why I recommended the a the other product, also no one knows what bacteria count is in any capsule its all guess work.

Wow 3g? I have only been taking 300 mg magnesium oxide.