Umm can you describe what side effects you're talking about? I'm assuming you have some itch maybe a little dandruff?
If that's the case, how bad is it?, Where is it occuring (hairline, Vertex, all over)?
Go to folligen.com you'll probably get your answer there. From what I remember the cream and lotion are best used on the hairline while the spray is best used on the entire scalp...I could be wrong though.
In the future please provide more infol in your post. If people know EXACTLY what your talking about you'll get more replies.
BHD