- Tachycardia
- Tachycardia, multifocal atrial
- Tachycardia, paroxysmal supraventricular
- Tachycardia, sinus
- Tachycardia, ventricular
- Tacrolimus
- Taenia saginata
- Taenia solium
- Takayasu's arteritis
- Tall stature
- Tamoxifen
- Tapeworm infection
- Tardive dyskinesia
- Targretin
- Tarsal tunnel syndrome
- Taxol
- Taxotere
- TB, active pulmonary infection
- TB, latent infection
- T cell lymphoma, cutaneous
- Telangiectasia
- Telmisartan
- Telogen effluvium
- Temazepam
- Temovate
- Temozolamide
- Temporal arteritis (giant cell)
- Tendonitis, patellar
- Tenecteplase (TNK-t-PA), for acute MI
- Tenex
- Tenofovir
- Tenormin
- Teratogenic drugs
- Teratoid tumors
- Teratoma, benign
- Teratoma, malignant
- Terazosin
- Terbinafine
- Terbutaline
- Testicular cancer
- Testicular mass or swelling
- Testicular pain (scrotal pain, groin pain)
- Testicular tumor
- Testosterone propionate
- Tetanus
- Tetany
- Tetracycline
- Teveten
- Thalassemia
- Thalassemias
- Thaliton
- Theca cell tumor
- Theca lutein cysts
- Theophylline
- Thiamin deficiency
- Thiazides
- Thiazolidinediones
- Thienbenzodiazepine
- Thioguanine
- Thioridazine
- Thiothixene
- Thioxanthenes
- Third-degree block
- Third-trimester bleeding
- Thoracic aortic aneurysm
- Thoracic outlet syndrome
- Thoracic spine, tuberculosis of
- Thorazine
- Thrombasthenia, Glanzmann's
- Thromboangiitis obliterans
- Thrombocytopenia
- Thrombocytosis
- Thromboembolism
- Thrombolytic therapy, for acute MI
- Thrombophlebitis
- Thrombosis
- Thrombotic occlusion
- Thrombotic thrombocytopenic purpura (TTP)
- Thrush
- Thryoid hormone excess
- Thymoma, paraneoplastic syndromes with
- Thyroid cancer
- Thyroid disease, in pregnancy
- Thyroid hormone
- Thyroiditis
- Thyroiditis, recurrent postpartum
- Thyroid nodules
- Thyrotoxicosis
- Thyrotoxicosis, in pregnancy
- TIA (transient ischemic attack)
- Tiagabine, for seizure
- Tiazac SA
- Tic douloureux
- Tics, in Tourette's syndrome
- Tilade
- Timolol
- Timolol maleatel
- Timolol solution
- Timoptic
- Timoptic-XE
- Tinea circinata
- Tinea corporis
- Tinea cruris
- Tinea manuum & pedis
- Tinea pedis
- Tinea unguium
- Tinea versicolor
- Tinnitus
- Tinzaparin
- Tissue plasminogen activator (t-PA)
- TNM staging
- Tobramycin 0.3% ointment
- Tobramycin 0.3% solution
- Toe callosities
- Tofranil
- Tolazamide
- Tolbutamide
- Tolectin
- Tolinase
- Tolmetin
- Toluene poisoning
- Tonic-clonic convulsive status epilepticus
- Tonic-clonic seizure
- Tonsillitis
- Topical dermatologic therapeutic agents
- Topical ophthalmic agents
- Topiramate, for seizure
- Topotecan
- Toprol XL (SR preparation)
- Toradol
- Toremifene
- Tornalate
- Torsemide
- Torsion dystonia
- Tosotumomab, I 131
- Total protein
- Tourette's syndrome
- Toxic epidermal necrolysis
- Toxic erythema, toxic
- Toxic shock syndrome, Staphylococcus aureus
- Toxidromes (poisoning syndromes)
- Toxin-induced hepatitis
- Toxocara canis
- Toxocara cati
- Toxocariasis
- Toxocariasis, ocular
- Toxoplasma gondii (toxoplasmosis)
- Tracheal stenosis
- Tramadol poisoning
- Trandate
- Trandolapril
- Transfusion reactions, hemolytic
- Transient ischemic attack (TIA)
- Transplantation
- Transsexuality
- Transudates
- Transvestism
- Tranxene
- Tranylcypromine
- Trastuzumab
- Trauma
- Travatan
- Traveler's diarrhea
- Travoprost 0.004% solution
- Trazodone
- Tremor
- Tremor, essential
- Trench fever
- Trench mouth
- Treponema pallidum infection
- Tretinoin
- Triamcinolone acetonide
- Triamterene, hydrochlorothiazide and
- Triazolam
- Triceram cream
- Trichinella spiralis
- Trichinosis
- Trichomonas vaginalis
- Trichophyton rubrum
- Trichuriasis
- Trichuris dysentery syndrome
- Trichuris trichiura
- Tricuspid regurgitation
- Tricyclic antidepressants
- Trifluoperazine
- Trifluridine 1% solution
- Trigeminal neuralgia
- Triglycerides, increased
- Triglycerides, increased, secondary causes of
- Trilafon
- Trilasate
- Trimethaphan
- Trimethobenzamide
- Trimethoprim-sulfamethoxazole
- Trimipramine
- Triptorelin pamoate
- Tropheryma whippelei
- Trophoblastic disease, gestational, paraneoplastic syndromes with
- Trophoblastic neoplasms, treatment of
- Trousseau's syndrome
- Trusopt
- Trypanosoma brucei gambiense
- Trypanosoma brucei rhodesiense
- Trypanosoma cruzi
- Trypanosomiasis, African (T b gambiense)
- Trypanosomiasis, African (T b rhodesiense)
- Trypanosomiasis, American (Chagas' disease)
- Tsetse flies
- TSH decreased
- TSH increased
- TTP
- Tuberculin skin test, positive, classification of reactions with
- Tuberculosis (TB)
- Tuberculous meningitis
- Tuberculous mycobacterial lymphadenitis
- Tuberculous peritonitis
- Tubo-ovarian abscess
- Tubular necrosis, acute
- Tubulointerstitial nephritis, in renal failure
- Tularemia
- Tumor
- Tungiasis
- Turner's syndrome
- Turpentine poisoning
- Tylenol
- Tylox
- Typhoid fever
- Typhus