Limestone is by definition a rock that contains at least 50% calcium carbonate in the form of calcite by weight. All limestones contain at least a few percent other materials. These can be small particles of quartz, feldspar, clay minerals, pyrite, siderite and other minerals.
Answers (4) You have not mentioned the name of the medicine in your post. Ideally 4 times a day means every 6 hours. It depends on what the medicine is as to how rigid you should be in regards to dosing. If the medicine is an antibiotic then every 6 hour dosing is important as is pain relief medication if in severe pain. If the dosing isn't so critical then 4 times a day could be evenly spaced out during the waking hours.
1 For oral dosage form (10 mg per 325 mg tablets): 2  Adultsâ. 3  LortabÂ®: One tablet every 4 to 6 hours as needed. 4  Your doctor may increase your dose as needed. 5  However, the dose is usually not more than 6 tablets per day. 6  Generic: Dose depends on the strength of the tablet and must be determined by your doctor.