- Subjects who are taking, or have taken, any prescribed, over-the-counter drug (other than 4 g per day paracetamol) or herbal remedies within 14 days, or for which 5 times the medication's elimination half-life will not be completed if longer, before the first dose of study medication. Exceptions may apply on a case by case basis, if considered not to interfere with the objectives of the study, as agreed by the Investigator and Sponsor's medical monitor. Standard dose multivitamins are permitted throughout the study period