Here's a list of erection offenders. If you're taking one of them, talk to your doctor. Often a similar pill, sans side effects, is on the market.

Medical name followed by (commercial name)

Chloropromazine (Thorazine)

Thiorizazine (Mellaril)

Mesoridazine (Serentill)

Trifluoperazine (Stelazien)

Fluphenazine (Prolixim)

Perphenazine (Trilafon)

Prochlorperazine (Compazine)

Chlorprothixene (Taractan)

Thiothixene (Mavane)

Dibenzazepine (Loxapine)

Risperidone (Risperidal)

Olanzapine (Zyprexa)

Alprazolam (Xanax)

Clonazepam (Klonopin)

Diazepam (Valium)

Propranolol (Inderal)

amitriptyline (Elavil/Endep)

amoxapine (Anafranil/Asendin/Elavil)

cloripramine (Anafranil)

desipramine (Norpramine)

doxepin (Adapin/Sinequan)

imipramine (Tofranil)

notriptyline (Aventil/Pamelor)

protriptyline (Anafranil/Asendin/Elavil)

trazodone (Desyrel)

isocraboxazi (Marplan)

phenelzine (Nardil)

tranylcypromine (Parnate)

citalopram (Celexa)

escitalopram (Lexapro)

fluoxetine (Prozac)

fluvoxamine (Luvox)

paroxetine (Paxil)

sertraline (Zoloft)

bupropion (Wellbutrin/Zyban)

mitazapine mirtazapine (Remeron)

nefazodone (Serzone)

reboxetine (Edronax/Vestra)

venlafaxine (Effexor)

Prochlorperazine (Compazine)

metoclopramide (Relgan)

cimetidine (Tagament)

ranititidine (Xantac)

flutamide (Eulexin)

leuprolide (Lupron)

nafarelin (Synaril)

nilutamide (Nilandron)

bicalutamide (Casodex)

Flutamide (Eulexin)

Ketoconazole (Nizoral)

Nilutamide (Nilandron)

Amiodarone (Cordarone/Pacerone)

Atenolol (Tenoretic/Tenormin)

Captopril (Capoten)

Chlorthalidone (Hygroton/Thalitone)

Clofibrate (Abitrate)

Clonidine (Catapres)

Diltiazem (Cardizem/Cartia/Dilicor)

Disopyramide (Norpace)

Enalapril (Vasotec)

Flecainide (Tambocor)

Gemfibrozil (Lopid)

hydralazine (Apresoline)

Labetolol (Normodyne/Trandate)

Lisinopril (Prinivil/Zestril)

Losartan (Cozaar)

Methyldopa (Aldomet/Amodopa)

Metoprolol (Lopressor/Toprol)

Mexiletine (Mexitil)

Nadolol (Corgard)

Nifedipine (Adalat/Procardia)

Pindolol (Visken)

Prazosin (Minipress)

Propafenone (Rythmol)

Propranolol (Inderal)

Ramipril (Altace)

Reserpine (Serpalan/Serpasil)

Simvastatin (Zocor)

Solatol (Betapace)

Spironolactone (Aldactone)

Timolol (Timoptic)

Valsartan (Diovan)

Verapamil (Calan/Covera/Isoptin/Verelan)

cytosine arabinoside (Cytosar-U)

5-fluorouracil (Adrucil)

methotrexate (Rheumatrex)

busulfan chlorambucil (Busulfan)

cyclophosphamide (Cytoxan/Neosar)

mechlorethamine (Mustargen)

melphalan (Alkeran)

ABVD bleomycin (Blenoxane)

cyclophosphamide cisplatin (platinum, visblastine, bleomycin, doxorubicin, dacarbazine)

cyclosphosphamide (Cytoxan/Neosar)

dacarbazine (DTIC-Dome)

isulfan mechlorethamine (Mustargen)

MOPP procarbazine (Matulane)

orednisone vinblatine vincristine (Oncovin/Vincasar)

vinblastine (Velban)

docetaxel-carbolplatin-amifostine (Taxotere)

fotemustine-cisplatine-etoposide oxaliplatin-fluoracil (Elaxotin)

paclitaxel-cisplatin-gemcitabine paclitaxel alone (Taxol)

paclitaxel-epirubicin paclitaxel-ciplatin paclitaxel-epirbicin-cisplatin paclitaxel-
ifosfamide-cisplatin thalidomide (Thalomid)

Nicotine Alcohol (chronic)

MDNA (Ecstacy)

itraconazole (Sporanox)

amiodarone (Cordoarone)

digoxin (Lanoxicaps/Lanoxin)

Propafenone (Rhymol)

Clofibrate (Atromid-S)

fenofibrate (Tricor)

genfibrosil (Lopia)

acetazolamide (Diamox)

aminocaproic acid (Amicar)

dichlorphenamide (Bentyl)

timolol (Timpotic)

alfa interferon 2a (Roferon A/IntronA)

baclofen (Zanalex)

cyclobenzaprine (Flexeril)

ethinoamide (Trecator)

etretinate (Tegison)

hydroxyzine (Vistaril)

indomethacin (Indocin)

isotretionate (Accutane)

meclizine (Antivert)

naprosen (Anaprox)

nixatidine (Axid)

orphenadrine (Norflex)

oxybutyrin (Ditropan)

phendimetrazine (Bortril)

primidone (Mysoline)

propanetheline (Pro-Banthine)

scopalamine (Transderm-Scop)

thiabendazole (Mintezol)