Certain drugs are known to put persons at risk of hypothyroidism. These include lithium and the heart med, amiodarone (Cordarone™).
Supplements rich in iodine such as kelp, bladderwrack, or bugleweed put one at risk for hypoT.
OTC medication labels sometimes advise caution against use by people with "thyroid disease". The term "thyroid disease" generally refers in this case only to hyperT, because the med raises the heart rate which can already be too high with this form of thyoid problem. These meds are generally safe for use by those with hypoT, and they do not in and of themselves cause thyroid problems.
Hope this answers your question.
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"We can complain because rose bushes have thorns, or rejoice because thorn bushes have roses." Abraham Lincoln
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Thyroid problems & medications 
