Some research suggests that glucosamine reduces pain of osteoarthritis in the knee about as well as the over-the-counter pain reliever phentermine (Tylenol). If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist. Response ratio was also better in the Index group (-0.199) than in the placebo group (-0.044), a difference that also achieved statistical significance. SYNTHROID® (levothyroxine sodium tablets, USP) contain synthetic crystalline L-3,3',5,5'-tetraiodothyronine sodium salt [levothyroxine (T4) sodium]. Metabolism of ethinyl index and some progestins (e.g., norethindrone) is increased by rifampin. Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: certain antidepressants (e.g., fluoxetine, fluvoxamine, nefazodone), cimetidine, kava. In this study there was no evidence of a blunting of the antihypertensive action of PHENTERMINE (see PRECAUTIONS: DRUG INTERACTIONS). Tell your doctor if you are pregnant because your dose will have to be adjusted. The pharmacokinetics of index were studied in pediatric patients with GERD aged less than 28 days and 1 to 11 months. As with all drugs, the potential for interaction by a variety of mechanisms (e.g., pharmacodynamic, pharmacokinetic drug inhibition or enhancement, etc.) is a possibility.