Hi, L Have Been On Spirolactone 25 Ml X Once

Hi, l have been on spirolactone 25 ml x once daily for 3 weeks , for bloodpressure control. So far the blood pressure is still erratic , average 165/80 , but my main concern now is this , could the spiro also be causing severe pain in the back of my right thigh ? Though this pain was there previous to taking the spiro , it is now to the stage where l need to take pain killers , panadol x2 , twice daily . I have had 2 sessions of massaging but that makes no difference. The pain kicks in after sitting down for 20 minutes , not while moving about though . Regards peter edwards