I took during my treatment and continue to take 500 MG of Vitamin B supplement per doctor's orders
It is from the prescribing information sheet for Olysio:
http://www.olysio.com/hcp/
Photosensitivity: Photosensitivity reactions have been observed with OLYSIOTM in combination with P/R, including serious reactions which resulted in hospitalization. Photosensitivity reactions occurred most frequently in the first 4 weeks of treatment with OLYSIOTM in combination with P/R, but can occur at any time during treatment. Photosensitivity may present as an exaggerated sunburn reaction, usually affecting areas exposed to light (typically the face, "V" area of the neck, extensor surfaces of the forearms, and dorsa of the hands). Manifestations may include burning, erythema, exudation, blistering, and edema.
Use sun protective measures and limit sun exposure during treatment with OLYSIOTM in combination with P/R. Avoid use of tanning devices during treatment with OLYSIOTM in combination with P/R. Discontinuation of OLYSIOTM should be considered if a photosensitivity reaction occurs and patients should be monitored until the reaction has resolved. If a decision is made to continue OLYSIOTM in the setting of a photosensitivity reaction, expert consultation is advised.
They checked for common drug interactions but there a millions of OTC and prescription meds out there so they cant check for everything.
Both Olysio and Sovaldi have patient support people who maybe able to answer your questions as well as your pharmasist or doctor those would be good resources of information
http://www.olysio.com/support
http://www.mysupportpath.com/
For myself I stopped taking a everything except my prescribed edema med spironolactone. I even stopped my multi vitamin. Also have herd recently multi vitamins may not be needed in people with normal healthy diets.
Experts: Don't Waste Your Money on Multivitamins
http://www.webmd.com/vitamins-and-supplements/news/20131216/experts-dont-waste-your-money-on-multivitamins
However you feel about vitamins I am confident you can forgo them for 12 weeks and just focus on eradicating your hep c.
Good luck
Lynn