Antihystamine is very specific. Antihistamine is quite generic and it depends on whether you want to treat allergies or schizophrenia. Here is a list from Wikipedia of the most common type of antihistamines (targeting the H¹ receptor)

List of H1 antagonists/inverse agonists

Acrivastine
Alimemazine (a phenothiazine used as antipruritic, antiemetic and sedative)
Amitriptyline (tricyclic antidepressant)
Amoxapine (tricyclic antidepressant)
Aripiprazole (atypical antipsychotic, trade name: Abilify)
Azelastine
Bilastine
Bromodiphenhydramine (Bromazine)
Brompheniramine
Buclizine
Carbinoxamine
Cetirizine (Zyrtec)
Chlophedianol (Clofedanol)
Chlorodiphenhydramine[12]
Chlorpheniramine
Chlorpromazine (low-potency typical antipsychotic, also used as an antiemetic)
Chlorprothixene (low-potency typical antipsychotic, trade name: Truxal)
Chloropyramine (first generation antihistamine marketed in Eastern Europe)
Cinnarizine (also used for motion sickness and vertigo)
Clemastine
Clomipramine (tricyclic antidepressant)
Clozapine (atypical antipsychotic; trade name: Clozaril)
Cyclizine
Cyproheptadine
Desloratadine
Dexbrompheniramine
Dexchlorpheniramine
Dimenhydrinate (used as an antiemetic and for motion sickness)
Dimetindene
Diphenhydramine (Benadryl)
Dosulepin (tricyclic antidepressant)
Doxepin (tricyclic antidepressant)
Doxylamine (most commonly used as an over-the-counter sedative)
Ebastine
Embramine
Fexofenadine (Allegra/Telfast)
Fluoxetine
Hydroxyzine (also used as an anxiolytic and for motion sickness; trade names: Atarax, Vistaril)
Imipramine (tricyclic antidepressant)
Ketotifen
Levocabastine (Livostin/Livocab)
Levocetirizine (Xyzal)
Levomepromazine (low-potency typical antipsychotic)
Loratadine (Claritin)
Maprotiline (tetracyclic antidepressant)
Meclizine (most commonly used as an antiemetic)
Mianserin (tetracyclic antidepressant)
Mirtazapine (tetracyclic antidepressant, also has antiemetic and appetite-stimulating effects; trade name: Remeron)
Olanzapine (atypical antipsychotic; trade name: Zyprexa)
Olopatadine (used locally)
Orphenadrine (a close relative of diphenhydramine used mainly as a skeletal muscle relaxant and anti-Parkinsons agent)
Periciazine (low-potency typical antipsychotic)
Phenindamine
Pheniramine
Phenyltoloxamine
Promethazine (Phenergan)
Pyrilamine (crosses the blood–brain barrier; produces drowsiness)
Quetiapine (atypical antipsychotic; trade name: Seroquel)
Rupatadine (Alergoliber)
Setastine (Loderix)
Setiptiline (or teciptiline, a tetracyclic antidepressant, trade name: Tecipul)
Trazodone (SARI antidepressant/anxiolytic/hypnotic with mild H1 blockade action)
Tripelennamine
Triprolidine