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About Layla Yeganeh
Expertise
I have researched and studied medicine, pharmacy, psychology and biology in college, through medical journals and research studies, I also have personal knowledge of the side effects, interactions and uses of many drugs for: antidepressants, alternative depression treatments, sleep aids, ADD, ADHD, psychiatric meds, weight loss, fibro, thyroid (Armour) versus synthetic, endocrinology, HRT, natural homeopathic drug interactions, toxicology, steroids, blood pressure, anxiety, birth control pills, Migraines, headaches, pain medications, TMJ, antibiotics, sinus and otolaryngoloy medications, as well as Immune therapy and allergy treatments, and many more. I would like to extend my knowledge and exerience to you, and offer advice so please don't hesitate to ask if you have a question. Every question is important, and no question is too difficult.

Experience
Psychology/Biology

Education/Credentials
Psychology/Biology B.S. PhD Psychology (working on)

 
   

You are here:  Experts > Health/Fitness > Pharmacology > Pharmacy > Drug Interactions with thyroid meds

Pharmacy - Drug Interactions with thyroid meds


Expert: Layla Yeganeh - 9/21/2007

Question
I have had hypothyroidism for 23 years.  I am 50 yr old female just barely beginning menopause.  My T3 & T4s have started to fluctuate over the last 2 - 3 years.  Doctor just changed me to 60 mg Armour Thyroid plus 100 mcg levothyroxine (changed from 180 Armour Thyroid).  I just now learned that I shouldn't take calcium with my thyroid meds (duh!).  Now I am also wondering if I should take my metoprolol - extended release (50 mg) that my doctor Rxed to control my adrenalin surges.  

My question is:  can I take metoprolol with my armour thyroid and levothyroxine?  With my B-Complex or Vitamin C?

Answer
There is low, to no interaction between throid meds you are on and Metoprolol XR.

The effects of Beta-blockers (examples: Coreg®, Inderal®, Lopressor®, Tenormin®, Toprol®) may be decreased by Thyroid Hormones in some patients, but interactions are not very common. These drugs are often used together. Report palpitations or rapid heart beat if they occur.

Calcium-
If taken at the same time, Calcium Carbonate may decrease the actions of Thyroid hormones by preventing proper absorption of the Thyroid hormone into the body. Examples of Thyroid hormones include Desiccated Thyroid, Levothroid®, Levoxyl®, Synthroid®, Thyrolar®, and Unithroid®. Take Thyroid hormones 1 hour before or 2 hours after you take Calcium supplements to avoid this interaction.

there is no interaction with vitamin C

Niacin in the b comlex has a moderate interation with metoprolol...

Side effects from Antihypertensive Agents (drugs used to treat high blood pressure) may get worse if you take Niacin, and vice versa. Although an interaction is possible, these drugs are often used together. If the blood pressure drops too low while taking these drugs together, you may become dizzy or feel faint. Do not stand or sit up too quickly. Taking some Antihypertensive Agents can also worsen skin flushing (warm and reddened skin of the face, neck or chest), which commonly occurs after taking Niacin. Skin flushing is more common with higher doses of Niacin or with immediate-release dosage formulations of Niacin (examples: Niacor®, Nicolar®, Nicotinex®). If skin flushing is troublesome after taking Niacin, talk to your health care provider. In some persons (who are able to take these medicines without problems), taking Aspirin or Ibuprofen 30 minutes prior to a Niacin dose can help to decrease skin flushing. Avoid alchohol or hot drinks that can worsen skin flushing while taking Niacin.

hope this helps

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