I have had 2 migraines in 2 weeks, could this be caused from welchol?

yes it can give you headaches here is some information for you

Welchol

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Welchol:

Constipation; headache; indigestion; muscle aches; nausea; sore throat; stomach pain or discomfort; tiredness; weakness.

Seek medical attention right away if any of these SEVERE side effects occur when using Welchol:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); choking; difficulty swallowing; severe constipation or diarrhea; severe or persistent dizziness or headache; symptoms of pancreas inflammation (eg, severe stomach or back pain with or without nausea or vomiting, stomach tenderness or swelling, fast heartbeat, dizziness); throat pain or irritation.

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if they continue i would see the doctor about it. it could be to high of a dose or you could be allergic to it,

i hope this was helpful if it was please mark yes next to was this answer helpful.

your friend