<s>[INST] I just took a meclizine 12.5 and hadn t taken them in a long time! I have also been on hydrocone only 1 a day because of knee pain getting ready to have knee replacement.. I do not feel the same as before I took it....Should I seek medical attention ? [/INST] no meclizine was the drug which is usually prescribed for motion sickness and sometimes to reduce vertigo it is an antihistamine </s>