Yes—some tablets really can increase the risk of blood clots, heart attack, or stroke, but the claim is too vague to be useful without knowing which tablets.
For example, the FDA requires prominent warnings for certain JAK-inhibitor medicines such as tofacitinib, baricitinib, and upadacitinib because they have been associated with increased risks of serious cardiovascular events and blood clots.
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U.S. Food and Drug Administration
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Some NSAID painkillers, including ketorolac, can also increase the risk of heart attack and stroke.
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Cleveland Clinic
The important distinction is that risk depends on the specific medicine, dose, duration, and your individual risk factors. You should not abruptly stop a prescribed medication based on a social-media warning.
If you give me the name of the tablets (or upload a photo of the package), I can check the official safety information and tell you exactly what the risks are.
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