In answer to the first question, 'Yes'. To the second, only antihistamines.
This is on the VH site, dated 16th May 2012
Ronnie Montrose on meeting Eddie Van Halen:
“The first tour I did with Van Halen, the bill was Journey, Ronnie Montrose, and Van Halen was opening. I was doing my instrumental music on that tour. Van Halen was a young, loud, and brash band, and I liked them. Eddie came up to me backstage at sound check and he called me Mr. Montrose. He shyly shook my hand and said, “Mr. Montrose, I’m Edward Van Halen, and I’m a big fan. We told Ted Templeman to get the Montrose sound when we did our record.” He also told me they used to play “Dancin’ Feet” from one of the Montrose albums at their yard parties in Pasadena.
“I really enjoyed Eddie’s playing. What made Eddie special was his youthful irreverence for the rules. That’s what impressed me. He’d developed his own style. I think Eddie started out on drums first, and there’s a very percussive nature about the way he plays. He plays very metered and percussive, and he’s very fluid in that style.”