I take accutane 5 mg 3x week, and always give me headaches its that dangerous?

Isotretinoin: It's not clear to me why you're taking Isotretinoin three times weekly rather than daily as indicated. Regardless, headaches are a known common adverse reaction as noted by epocrates.Com. As always, it's best to discuss risks, benefits & alternatives w/your physician before accepting any medication, therapy or surgery especially when directions aren't as usual.