| Pontocaine (pon’-toe-kain) | Tetracaine (the’tra-kain) |
| Premarin (Preh-ma-rin ) | Conjagate estrogen (kon’-joo-gay-ted Es’tro-jens) |
| Primaquine (Prim’-a-Kwin) | SAME |
| Procan SR ( Pro’-can) SR | Procainamide (pro-cain’-a-mide) |
| Procardia (pro-car’dee-a) | Nifedipine (Nie-fed’-eh-peen) |
| Pronestryl (Pro-nes’-til) | Procainamide (pro-cain’-a-mide) |
| Propylthiouracil (pro-pil-thie-o-ur-eh-sil) | SAME |
| Proventil (pro-ven’-til) | Albuterol (Al-bu’-ter-ol) |
| Provera (Pro-veh’-ra) | Medroxyproesterone (Med-drok-si-pro-jes-the-rone) |
| Prozac (pro’-zac) | Fluoxetine (flew-oks’-eh-teen) |
| PTU | Propylthiouracil (pro-pil-thie-o-ur-eh-sil |
| Pyridium (pie-rid’-ee-um) | Phenazopyridine (Fen-az-o-pie’-reh-deen) |
| Questran (quest’-tran) | Chlolestyramine (klo-es-tie’-ra-meen) |
| Quinidine (Kwin’-eh-deen) | SAME |
| Quinine (kwie’-nine) | SAME |
| Restoril (res’-toe-ril) | Temazepam (Tem-az’-eh-pam) |
| Retin A (Reh-tin A) | Tretinoin (Treh-the-noin) |
| Rifadin (rie-fad’-in) | Rifampin (rie-fam’-pin) |
| Riopan (rie-o-pan) | Magaldrade (mag’-al-drate) |
| Rimactane (Rie-mak’-tane) | Rifampin (rie-fam’-pin) |
| Ritalin (reh-tah-lin) | Methylphenidate (Meth-il-fen’-eh-date) |
| Robaxin (Roe-bak’-sin) | Methocarbamol (Meth-o-car’-ba-mol) |
| Robitussin (Roe’beh-tus-sin) | Guaifenesin (Gwie-fen’-eh-sin) |
| Robitussin DM (Roe’beh-tus-sin) | Guaifenesin (Gwie-fen’-eh-sin) & Dextromethorphen (Deks-tro-meh-thor’-fan) |
| Seldane (Sel’-dane) | Terfenadine (ter-feh’-na-deen) |
| Selsun (Sel’-sun) | Selenium sulfide |
| Septra (sep’-tra) | Co-trimoxazole (ko-tri-moks’-a-zole) |
| Silvadene (Sil’-va-deen) | Silver-sulfadiazine (sul-fa-die’-a-zeen) |
| Sinemet (sie-eh-met) | Levodopa (leave-o-do’-pa) |
| Sinequan (sin’-eh-kwan) | Doxepin (doks-eh-pin) |
| Sorbitrate (sor’-beh-trate) | Isosorbide (I-so-sor’-bide) |
| Stelazine (Stel’-a-zeen) | Trifluoperazine (trie-flu-oper’-a-zeen) |
| Stoxil (stok’-sil) | Idoxurine (I-doks’-u-reen) |
| Sudafed (su’-da-fed) | Pseudoephedrine (Su-dough-eh-feh’-drin) |
| Sulamyd (Sul-a-mid) | Sulfacetamide (Sul-fa-seat’-a-mide) |
| Sultrin (Sul’-trin) | Sulfacetamide (Sul-fa-seat’-a-mide)
Sulfathiazole (Sul-fa-thie’-a-zole) Sulfabenzamide (sul-fa-benz’-a-mide) |
| Surfar (sur’-fur) | Docusate (Dok-u-sate) Calcium |
| Synkavite (Sin’-ka-vite) | Menadiol (Men-a-die’-ol) |
| Synthroid (Sin’-throid) | Levothyroxine (Lee-vp-thie-rok’-seen) |