I have to start taking mepron (atovaquone) for lyme's disease. Any side effects?

Some. Mepron (atovaquone) can cause some combination of fevers, headaches, insomnia, nausea, vomiting, diarrhea and rash in >10% of people who take it. Mepron is not commonly used to treat lyme disease.

Related Questions

What to do if I have to start taking mepron (atovaquone) for lyme's diseasehas anyone taken this and did you have any side effects?

Not 1st line. Lyme disease is normally treated with Doxycycline or rocrphin depending on stage of the disease. Mepron (atovaquone) is normally used for babesia. It is sometimes prescribed for Lyme disease but is not a first line treatment. It is also not the recommended treatment by the American college of rheumatology. Common side effects of Mepron (atovaquone) include stomach problems, sweating, a funny taste, dizziness.