I'm not on Reductil so I can't give you any advice based on personal experience, but I would strongly advise talking to your doctor and pharmacist before combining any medications. Some drugs in combination can be dangerous to your health. And even if one of those drugs is in herbal form it can still interact in a dangerous way with the medications you are taking (link to Choice report on this topic
If you're ever in doubt about combining different medications have a chat to your pharmacist. They're trained to spot dangerous combinations of drugs and it's worth it for peace of mind.