The risk or severity of adverse effects can be increased when Piracetam is combined with Liotrix. The risk or severity of adverse effects can be increased when Piracetam is combined with Thyroid, porcine. The risk or severity of adverse effects can be increased when Piracetam is combined with Liothyronine. The risk or severity of adverse effects can be increased when Piracetam is combined with Levothyroxine.