They are "allowed". It is best to take these types of supplements at bedtime however because alli blocks about 25% of the fat you consume and these are fat-based supplements. It is not dangerous, you just might not absorb 100% of the dose if you take them at any other time during the day while you are taking alli.
Hope this helps!
Maria Marzella Sulli, Pharm.D.
Maria Marzella Sulli, Pharm.D.