As well as the medicines prescribed for us by our doctors we are faced with an often overwhelming array of over the counter medication, supplements and natural remedies that may be indicated for the symptoms of our illnesses. Often, though, we forget that these can also have adverse reactions, interact with each other or the medications already prescribed for us. It is always advised to take the advice of a suitably qualified medical professional before self-medicating with any treatment.
To help inform discussions with your doctor/pharmacist about a product you may wish to try, WebMD produce a useful patient information resource on supplements, over the counter medicines and prescription medicines, including interactions between them:
This link takes you to their Vitamins & Supplements Centre
This link takes you to their Drugs & Medications Centre
You can view information on interactions from the page of each individual supplement or drug but there is also a dedicated tool WebMDinteractionchecker
Other online drug interactions checkers can be found at:
Drugs.com - Drug Interactions Checker
Medscape - Drug Interaction Checker
RXList.com - Drug Interaction Checker
PLEASE TAKE NOTE OF THE DISCLAIMERS ON ALL THESE SITES AND ALWAYS ENSURE YOU TAKE THE ADVICE OF A SUITABLY QUALIFIED MEDICAL PROFESSIONAL
Other useful resources include:
U S Food and Drug Administration
Gov UK Medicines and Healthcare products Regulations Agency
PainEDU Improving Pain Treatment Through Education have a number of helpful Interactive Tools relating to pain medications and pain therapies.