Oxybutynin is an anticholinergic medication used to relieve urinary and bladder difficulties.Target: mAChROxybutynin is an anticholinergic medication used to relieve urinary and bladder difficulties, including frequent urination and inability to control urination (urge incontinence), by decreasing muscle spasms of the bladder. Oxybutynin competitively antagonizes the M1, M2, and M3 subtypes of the muscarinic acetylcholine receptor. It also has direct spasmolytic effects on bladder smooth muscle as a calcium antagonist and local anesthetic, but at concentrations far above those used clinically. Oxybutynin is available orally in generic formulation or as the brand-names Ditropan, Lyrinel XL, or Ditrospam, as a transdermal patch under the brand name Oxytrol, and as a topical gel under the brand name Gelnique. Oxybutynin is also a possible treatment of hyperhidrosis (hyper-active sweating) [1-3].
Diphenidol hydrochloride is a muscarinic antagonist employed as an antiemetic and as an antivertigo agent.
Muscarine ((+)-Muscarine) tosylate is an agonist of prototype mAChR. Muscarine tosylate is a toxin that can stimulate the parasympathetic nervous system[1][2].
TBPB is an allosteric M1 mAChR agonist(EC50=289 nM) that regulates amyloid processing and produces antipsychotic-like activity in rats.IC50 value: 289 nM(EC50) [2]Target: M1 mAChR agonistin vitro: TBPB activates M(1) through an allosteric site rather than the orthosteric acetylcholine binding site, which is likely critical for its unprecedented selectivity. Whole-cell patch-clamp recordings demonstrated that activation of M(1) by TBPB potentiates NMDA receptor currents in hippocampal pyramidal cells but does not alter excitatory or inhibitory synaptic transmission, responses thought to be mediated by M(2) and M(4) [1]. in vivo: TBPB was efficacious in models predictive of antipsychotic-like activity in rats at doses that did not produce catalepsy or peripheral adverse effects of other mAChR agonists [1].
Xanomeline (LY 246708) is the potent agonist of muscarinic M1/M4 receptor with antipsychotic-like activity. Xanomeline (LY 246708) increases neuronal excitability. Xanomeline (LY 246708) can be used for the research of schizophrenia[1][2][3].
Homatropine hydrochloride is an orally active anticholinergic agent that rapidly dilates pupils and has cycloplegic effects. Homatropine hydrochloride also has antitussive activity. Homatropine hydrochloride can be used in research on eye diseases and coughs[1].
Piperidolate hydrochloride is an antimuscarinic, inhibits intestinal cramp induced by acetylcholine (rats and dogs).
Tiotropium Bromide hydrate is an anticholinergic and bronchodilator and a muscarinic receptor antagonist.Target: mAChRTiotropium bromide (Ba 679 BR) is a novel potent and long-lasting muscarinic antagonist that has been developed for the treatment of chronic obstructive airways disease (COPD). Binding studies with [3H]tiotropium bromide in human lung have confirmed that this is a potent muscarinic antagonist with equal affinity for M1-, M2- and M3-receptors and is approximately 10-fold more potent than ipratropium bromide. In vitro tiotropium bromide has a potent inhibitory effect against cholinergic nerve-induced contraction of guinea-pig and human airways, that has a slower onset than atropine or ipratropium bromide. tiotropium bromide dissociates slowly from M3-receptors (on airway smooth muscle) but rapidly from M2 autoreceptors (on cholinergic nerve terminals) [1]. Tiotropium bromide is a quaternary ammonium derivative that binds to muscarinic receptors. However, although tiotropium binds with high affinity to muscarinic receptors of M1-, M2- and M3-subtypes, it dissociates very slowly from M1- and M3-receptors but more rapidly from M2-receptors, thereby giving it a unique kinetic selectivity [2].
Emraclidine is a muscarinic M4 receptor positive allosteric modulator (WO2018002760, compound 11). Emraclidine can be used for the research of neurological diseases[1].
VU0467154 is a positive allosteric modulator of the M4 muscarinic acetylcholine receptor (mAChR), potentiating the response to ACh with pEC50s of 7.75, 6.2 and 6 for rat, human and cynomolgus monkey M4 receptor, respectively.
Cyclopentolate (DL-Cyclopentolate) hydrochloride is an anti-muscarinic agent commonly used in the ophthalmologic practice. Cyclopentolate hydrochloride is an Atropine-like muscarinic receptors antagonist with a pKB value of 7.8 (on the circular ciliary muscle)[1][2].
M1/M2/M4 muscarinic agonist 1 (Compound 42) is a muscarinic M4/M1/M2 agonist with EC50 values of 6.5, 26 and 210 nM for M4/M1/M2, respectively. M1/M2/M4 muscarinic agonist 1 can be used for research on mental diseases, such as schizophrenia, delusion, etc[1].
Solifenacin D5 hydrochloride is a deuterium labeled Solifenacin hydrochloride. Solifenacin hydrochloride is a muscarinic receptor antagonist with pKis of 7.6, 6.9 and 8.0 for M1, M2 and M3 receptors, respectively[1].
Sofpironium bromide (BBI 4000) is an anticholinergic agent used in the study of primary axillary hyperhidrosis (PAH). Sofpironium bromide reduces sweating by inhibiting M3 muscarinic receptors in eccrine glands at the application site. Sofpironium bromide also has a high afnity for the M1, M2, M4 and M5 subtypes[1].
Tropicamide is an anticholinergic and a muscarinic receptor subtype M4-preferring antagonist .Target: mAChRTropicamide is an antimuscarinic drug that produces short acting mydriasis (dilation of the pupil) and cycloplegia when applied as eye drops. It is used to allow better examination of the lens, vitreous humor, and retina. Due to its relatively short duration of effect (4-8 hours), it is typically used during eye examinations such as the dilated fundus examination, but it may also be used before or after eye surgery. Cycloplegic drops are often also used to treat anterior uveitis, decreasing risk of posterior synechiae and decreasing inflammation in the anterior chamber of the eye [1-3].
YM-46303 is an mAChR antagonist which exhibits the highest affinities for M1 and M3 receptors, and selectivity for M3 over M2 receptor.
M1 ligand 1 (compound 3b-b) is a muscarinic acetylcholine receptor M1 ligand. M1 ligand 1 is a N-desmethyl congener of arecoline derivative. M1 ligand 1 can be used as PET (positron emission tomography) radiotracer[1].
Flavoxate is a potent and competitive phosphodiesterase (PDE) inhibitor. Flavoxate is an antispasmodic agent and muscarinic mAChR antagonist. Flavoxate shows moderate calcium antagonistic activity and local anesthetic effect. Flavoxate can be used for the research of overactive bladder (OAB) and lower urinary tract infections[1][2].
Racanisodamine is one of the racemic isomers of anisodamine, resembles anisodamine in pharmacological effect. Racanisodamine is a non-selective muscarinic antagonist, used as a component of eye drops for myopic control[1].
Darenzepine is a muscarinic receptor inhibitor extracted from patent US 20170095465 A1.
Cycrimine is an orally active muscarinic cholinergic receptor (mAChR) M1 antagonist, reduces the acetylcholine levels in parkinson model. Cycrimine shows antispasmodic activity, can be used in studies of behavioral and mental disorder[1][2][3][4].
Trospium Chloride is a competitive muscarinic cholinergic receptor antagonist.Target: mAChRTrospium chloride is an antimuscarinic agent indicated for the treatment of overactive bladder with symptoms of urge urinary incontinence, urgency, and urinary frequency. Trospium has pharmacologic properties that are distinct from other antimuscarinic agents [1]. After oral administration, absorption of the hydrophilic trospium chloride is slow and incomplete. Peak plasma concentrations (Cmax) of approximately 4 ng/mL are reached 4-5 hours after administration of a 20 mg immediate-release preparation. The mean bioavailability is approximately 10% and decreases by concomitant food intake (to a mean of 26% of the fasting area under the plasma concentration-time curve [AUC]). Trospium chloride displays dose proportional increases in AUC and Cmax after a single dose within the clinically relevant dose range (20-60 mg). The mean volume of distribution is approximately 350-800 L [2].
(R)-Oxybutynin (Aroxybutynin), a (R)-isomer of Oxybutynin, is an orally active muscarinic receptor antagonist. (R)-Oxybutynin has antimuscarinic, antispasmodic and anticholinergic activity, competitively antagonizes Carbachol-induced contractions. (R)-Oxybutynin can be used for researching incontinence due to neurogenic bladder dysfunction[1][2][3].
Scopolamine hydrobromide is a high affinity (nM) muscarinic antagonist. 5-HT3 receptor-responses are reversibly inhibited by Scopolamine with an IC50 of 2.09 μM.
Procyclidine (Tricyclamol; (±)-Procyclidine), an anticholinergic agent, is a muscarinic receptor antagonist that also has the properties of an N-methyl-D-aspartate (NMDA) antagonist. Procyclidine can be used in studies of Parkinson's disease and related psychiatric disorders such as Soman-induced epilepsy[1][2].
Milameline is a muscarinic receptor agonist that improves cognition.
Cyclopentolate (DL-Cyclopentolate) is an Atropine-like muscarinic receptors antagonist with a pKB value of 7.8 (on the circular ciliary muscle). Cyclopentolate is an anti-muscarinic agent commonly used in the ophthalmologic practice[1][2].
Biperiden(KL 373) is an antiparkinsonian agent, which is the selective central M1 cholinoreceptors blocker.Target: M1 receptorsBiperiden is an antiparkinsonian agent of the anticholinergic type. It is used for the adjunctive treatment of all forms of Parkinson's disease (postencephalitic, idiopathic, and arteriosclerotic)[1]. Biperiden has an atropine-like blocking effect on all peripheral structures which are parasympathetic-innervate. It also has a prominent central blocking effect on M1 receptors [2].Biperiden (0.11 mg/kg), benactyzine (0.3 mg/kg),caramiphen (10 mg/kg), procyclidine (3 mg/kg), and trihexyphenidyl (0.12 mg/kg) separately and each in combination with physostigmine (0.1 mg/kg) is to make a comparative assessment of potential cognitive effects. The results showed that benactyzine, caramiphen, and trihexyphenidyl reduced rats' innate preference for novelty, whereas biperiden and procyclidine did not [3].Clinical indications: parkinsonismFDA Approved Date: Toxicity: Drowsiness; vertigo; headache; dizziness
Afacifenacin (SMP-986) is a potent and orally active muscarinic receptor antagonist. Afacifenacin inhibits the bladder afferent pathway through the sodium-channel blockade, increasing volume, and reducing the frequency of urination and incontinence. Afacifenacin has the potential for the research of overactive bladder (OAB)[1][2].
TAK-071 is a novel muscarinic acetylcholine receptor 1 (M1R) positive allosteric modulator. EC50 of TAK-071 M1R agonist activities is 520 nM[1].