If you or someone you care about has had to take medicine for more than a year, it may be time to have some blood tests done. Even though medications can keep you healthy, some of them can cause harm if you take too much. Certain drugs can hurt the liver or kidneys. Other drugs may make you confused or cause other negative side effects.

Yearly blood tests are the best way to make sure your medicines are doing what they should. Check the following list of medications. If you take one or more of them, and your doctor hasn’t had your blood tested, be sure to ask about it at your next visit.

Description	Drugs
ACE inhibitors	Benazepril (Lotensin) Captopril (Capoten) Enalapril (Vasotec) Fosinopril (Monopril) Lisinopril (Prinivil, Zestril) Moexipril (Univasc) Perindopril (Aceon) Quinapril (Accupril) Ramipril (Altace) Trandolapril (Mavik)
ACE inhibitors — combination products	Benazepril + HCTZ (Lotensin HCT) Captopril + HCTZ (Capozide, Hydrochlorothiazide + Captopril) Enalapril + HCTZ (Vaseretic) Fosinopril + HCTZ (Monopril HCT) Lisinopril + HCTZ (Prinzide, Zestoretic, Hydrochlorothiazide + Lisinopril) Moexipril + HCTZ (Uniretic)
ARBs and ARB combination products	Candesartan (Atacand) Eprosartan (Teveten) Irbesartan (Avapro) Losartan (Cozaar) Losartan + HCTZ (Hyzaar HCT) Olmesartan (Benicar) Telmisartan (Micardis) Valsartan (Diovan)
Digoxin and digoxin combination products	Digoxin (Digitek, Lanoxicaps, Lanoxin)
Thiazide diuretics	Bendroflumethiazide (Naturetin) Chlorothiazide (Diuril) Chlorthalidone (Hygroton) Hydrochlorothiazide (Esidrix, HydroDiuril, Microzide) Indapamide (Lozol) Methyclothiazide (Aquatensin, E nduron) Metolazone (Mykrox, Zaroxolyn) Polythiazide (Renese) Trichlormethiazide (Diurese, Metahydrin, Naqua)
Potassium-sparing diuretics	Amiloride (Midamor) Eplerenone (Inspra) Spironolactone (Aldactone) Triamterene (Dyrenium)
Potassium-wasting diuretics	Bumetanide (Bumex) Ethacrynic acid (Edecrin) Furosemide (Lasix) Torsemide (Demadex)
Combination potassium-sparing/ -wasting diuretics	Amiloride/HCTZ (Moduretic) Spironolactone/HCTZ (Aldactazide) Triamterene/HCTZ (Dyazide, Maxzide)
Diuretics — combination products	Atenolol/chlorthalidone (Tenoretic) Chlorthalidone/clonidine (Combipres) HCTZ/Benazepril (Lotensin) HCTZ/Bisoprolol (Ziac) HCTZ/Enalapril (Vaseretic) HCTZ/Eprosartan (Teveten HCT) HCTZ/Irbesartan (Avalide) HCTZ/Lisinopril (Prinzide, Zestoretic) HCTZ/Losartan (Hyzaar) HCTZ/Methyldopa (Aldoril) HCTZ/Metoprolol (Lopressor HCT) HCTZ/Moexipril (Uniretic) HCTZ/Olmesartan (Benicar HCT) HCTZ/Propranolol (Inderide, Inderide LA) HCTZ/Timolol (Timolide) HCTZ/Valsartan (Diovan) Nadolol/bendroflumethiazide (Corzide) Polythiazide/prazosin (Minizide)
Phenobarbital	Phenobarbital (Luminal)
Phenytoin	Dilantin Phenyte
Valproic acid/valproate (dipropylacetic acid)	Depacon Depakene Depakote Divalproex sodium Sodium valproate