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ContraVir Pharmaceutcals (CTRV)

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Last Post: 12/29/2017 10:11:05 PM - Followers: 54 - Board type: Free - Posts Today: 0


ContraVir is developing drug candidates for expanding market segments with high unmet need.



Hepatitis B is an infectious disease caused by the hepatitis B virus (“HBV”). Individuals who develop chronic HBV are at much greater risk for liver disease later on in their life. The greatest risk posed is potential cirrhosis of the liver and hepatocellular carcinoma. The U.S. is the largest individual market and is growing rapidly.


Herpes zoster, also commonly known as shingles, is a neurological disorder caused by the reactivation of varicella zoster virus, the same virus that causes chicken pox. Based on recent research and publications, we estimate that there are over four million cases of shingles in the U.S., Europe and Japan each year.


ContraVir is dedicated to serving patients and healthcare professionals by developing clinically-differentiated therapeutic products that address high-need market segments. ContraVir brings its financing, product development, and commercialization expertise to create long-term value for partners with unique clinical candidates.

TXL™ Phase 1

Title: A Phase 1, Randomized, Partial-Blind, Placebo-controlled, Sequential Dose Group, Ascending, Multiple Dose Study of the Safety, Tolerability and Pharmacokinetics, With Food Effect, of TXL™ in Healthy Subjects

Condition: Infectious Disease

Interventions: TXL™; Placebo


Primary Objective: To evaluate the safety and tolerability of multiple oral (PO) doses of TXL™ at increasing dose levels

Secondary Objective: To evaluate the pharmacokinetics of multiple doses of TXL™ at increasing dose levels, in a fasted state; to evaluate the pharmacokinetics of a single dose of TXL™ 50 mg in a fed state


Age: 18 years to 55 years

Gender: Both

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Capable of giving written informed consent
    Capable of completing study requirements

Exclusion Criteria:

  • Positive result for HIV, HBV, or HCV
    History or medical condition which could impact patient safety
    Current or past abuse of alcohol or illicit drugs
    Participation in another clinical trial within the past 30 days

Hepatitis B

ContraVir is developing Tenofovir Exalidex (TXL™) for Hepatitis B in Phase 2 clinical studies. TXL™ is a novel lipid acyclic nucleoside phosphonate that delivers high intracellular concentrations of the active antiviral agent of tenofovir, marketed by Gilead as Viread®.

TXL™’s novel structure results in decreased circulating levels of tenofovir, lowering systemic exposure and thereby reducing the potential for renal side effects. TXL™ has completed a Phase 1 clinical trial in healthy volunteers, demonstrating a favorable safety, tolerability, and drug distribution profile.

ContraVir believes a potentially best-in-class antiviral like TXL™ can become the cornerstone of a curative combination therapy for hepatitis B. The combination would include multiple drugs that inhibit different points in the viral life cycle, such as ContraVir’s cyclosporine A-derived antiviral TXL™, which is currently in preclinical development.

Potential Advantages of TXL™ over Tenofovir
  • Increased efficacy by boosting bioavailability
    Takes advantage of natural lipid uptake mechanisms
    Decreased renal toxicity by reduced circulating TFV
    97-fold more active against HBV in vitro



Title: A Phase 2, Randomized, Open-label, Ascending, Sequential Dose Group, Multiple Dose Study of the Safety, Tolerability, Pharmacokinetics and Antiviral Activity of TXL™ in HBV-infected Subjects

Condition: Infectious Disease

Interventions: TXL™; TDF (Viread)



Primary Objective: To evaluate the safety and tolerability of multiple oral (PO) doses of TXL™ at multiple ascending dose levels; to evaluate the antiviral activity of TXL™ versus Tenofovir disproxil fumarate (TDF; Viread)

Secondary Objective: To evaluate the pharmacokinetics (PK) of multiple doses of TXL™ at multiple dose levels in a fasted state


Age: 18 years to 65 years

Gender: Both

Healthy Volunteers: Not accepted

Inclusion Criteria:

  • Capable of giving written informed consent
    Capable of completing study requirements
    Chronic hepatitis B positive
    HBV treatment naïve

Exclusion Criteria:

  • Positive result for HCV (hepatitis C virus), HDV (hepatitis D virus) or HIV (human immunodeficiency virus)
    History or medical condition that could impact patient safety
    Current or past abuse of alcohol or illicit drugs
    Abnormal laboratory value or ECG
    Pregnant or breastfeeding
    Clinical, histologic or laboratory evidence of significant liver fibrosis or cirrhosis
    Systemic immunosuppression
    Received an investigational drug or investigational vaccine within the 90 days prior to the first dose of study drug


Hepatitis B

ContraVir is developing CRV431 for treating hepatitis B and is currently preparing to enter IND-enabling studies based on strong preclinical data. CRV431 belongs to a known drug class of cyclophilin inhibitors derived from cyclosporine A, and was designed specifically to optimize potency and selectivity against HBV.

CRV431 works by disrupting certain host mechanisms that are “hijacked” by HBV as it replicates within liver cells. It is expected to be effective against all HBV genotypes due to the fact that it interrupts more than one point in the viral life cycle that are common in all HBV sub-types.

Potential Advantages of CRV431
  • Best-in-class potency and selective index against HBV
    Interrupts HBV at multiple points, limiting replication and potential resistance
    Blocks HBV entry into liver cells and suppresses HBsAg and HBeAg in vitro
    Reduces HBV DNA without toxicity; prevents liver fibrosis in vivo


Valnivudine™ Phase 3



Title: A Multicenter, Randomized, Double-Blind, Parallel Group, Comparative Study of Valnivudine™ vs. Valacyclovir for the Prevention of Post-Herpetic Neuralgia and Treatment of Acute Herpes Zoster-Associated Pain

Condition: Shingles/Herpes Zoster

Interventions: Valnivudine™; Valacyclovir

Learn about the Valnivudine™ Clinical Trial at >>


Primary Objective: To evaluate the incidence of post-herpetic neuralgia (PHN) following treatment with 2 dose regimens of Valnivudine™ compared to Valacyclovir

Secondary Objectives: To evaluate the effect on pain associated with acute herpes zoster (AHZ) of 2 dose regimens of Valnivudine™ compared to Valacyclovir; to describe the effect on lesion formation and healing of 2 dose regimens of Valnivudine™ compared to Valacyclovir

Safety: To evaluate the safety profile of 2 dosing regimens of Valnivudine™ as compared to Valacyclovir

Pharmacokinetic: To evaluate the pharmacokinetic (PK) profile of the active metabolite (CF-1743) of Valnivudine™ after 7 days of dosing at 400 mg once-daily (QD) compared with 400 mg twice-daily (BID)

Methodology: A multicenter, randomized, double-blind, parallel-group, active-controlled comparative study of the safety and efficacy of 2 dosing regimens of Valnivudine™ versus Valacyclovir administered for 7 days in subjects with uncomplicated AHZ. Subjects diagnosed with uncomplicated AHZ within 120 hours of lesion appearance and Worst Pain in the Last 24 hours of ≥4 (0-10 numerical rating scale) at Visit 1/Day 1, will be randomized (1:1:1) to one of 3 treatment groups and will begin study treatment at Visit 1/Day 1 to either:

  • Valnivudine™ 400 mg QD
    Valnivudine™ 400 mg BID (total daily dose of 800 mg)
    Valacyclovir 1000 mg 3 times a day for a total daily dose of 3000 mg

Efficacy assessments for lesion status and AHZ pain are captured until Day 120.

Post-herpetic Neuralgia (PHN)

We are developing Valnivudine™ as a fast-acting, low-dose, once-daily, oral antiviral therapy for the treatment of herpes zoster, or shingles, an infection caused by the reactivation of the varicella zoster (chicken pox) virus. In addition to its potent antiviral activity, Valnivudine™ has demonstrated an ability to reduce the incidence and severity of debilitating shingles-associated pain, known as post-herpetic neuralgia, or PHN.

We are currently conducting a pivotal Phase 3 trial that will compare Valnivudine™ to valacyclovir (Valtrex®) with shingles pain reduction as a primary endpoint.


Driven primarily by the aging adult population, the rate of shingles is increasing steadily. Recent research estimates there are more than four million cases of singles each year in the major markets of the U.S., Europe, and Japan, of which more than half occur in the U.S. Further, approximately two-thirds of shingles patients suffer from pain for 30 days or longer. Learn more about shingles and shingles pain >>

The pain associated with an episode of shingles is attributed to both the damage caused to the affected nerves by the replication of varicella zoster virus and the inflammatory response associated with the infection.

For many patients, shingles-associated pain does not resolve when the lesions heal and the inflammation subsides, but, rather, continues for months, or possibly years. Shingles-associated pain, or PHN, is the most common and clinically relevant complication of shingles.

Post-herpetic Neuralgia (PHN)
  • Mild to excruciating pain long after shingles rash resolves
    >65-70% of shingles patients suffer from PHN for 30 days or more; can last for 2-3 years
    Disrupts sleep, mood, work, and activities of daily living


  • Rapid onset of action for quick pain relief
    Higher potency vs. approved agents against herpes zoster
    Efficacy profile superior to valacyclovir
    Potential for QD dosing vs. 3-5x daily for valacyclovir
    No dose adjustments needed for patients with renal insufficiency

Clinical Data

Phase 1 and 2 trials of Valnivudine™ were successfully completed. We are currently conducting a pivotal Phase 3 trial in patients with shingles to further explore Valnivudine’s™ potential ability to reduce shingles pain.

Demonstrated Safety and Efficacy
  • >350 patients treated with Valnivudine™
    Clinically meaningful reduction in PHN occurrence versus valacyclovir
    Meaningful reduction in time to resolution of clinically significant pain
    8-10% fewer patients required narcotics for pain control
    Safety similar to other antivirals

Phase 3 Study

ContraVir’s pivotal Phase 3 study seeks to compare Valnivudine™ to valacyclovir (Valtrex®) with shingles pain reduction as a primary endpoint.
Phase 3 Study Design
  • Multi-center, randomized, double-blind, parallel-group, comparative study (Valnivudine™ vs. valacyclovir)
    Up to 200 centers (U.S. only)
    Three-arm study: Valnivudine™ 400mg QD, Valnivudine™ 400mg BID, Valacyclovir 1000mg TID
    985 patients estimated with 275 patients per arm
    Patients aged 30 years and older
    Seven day treatment period; follow up through day 120

Scientific Research

Pharmacokinetic data from completed Phase 1 and 2 clinical trials suggest that Valnivudine™ has the potential to demonstrate antiviral activity when dosed orally once-a-day at significantly lower blood levels than acyclovirvalacyclovir, and famciclovir, the FDA-approved drugs used for the treatment of shingles.


  •                                 TXL™ composition of matter to 2031
                                   CRV431 composition of matter to 2031
                                 Valnivudine™ composition of matter to 2027


Current Price
Bid Ask Day's Range
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CTRV News: Proxy Statement - Notice of Shareholders Meeting (preliminary) (pre 14a) 01/12/2018 05:13:57 PM
CTRV News: Statement of Changes in Beneficial Ownership (4) 01/05/2018 01:11:07 PM
CTRV News: Statement of Changes in Beneficial Ownership (4) 01/05/2018 01:10:15 PM
CTRV News: Statement of Changes in Beneficial Ownership (4) 01/05/2018 01:10:15 PM
CTRV News: Current Report Filing (8-k) 01/03/2018 11:28:32 AM
#634   This company turned into a pos real quick mikekrane 12/29/17 10:11:05 PM
#633   I just read this lol can u get mikekrane 12/01/17 04:15:53 PM
#632   Hey buddy...EKSO hurry RainerRocks 11/17/17 10:04:40 AM
#631 I told you a month ago : RainerRocks 11/15/17 01:08:34 AM
#630   Lmaoo i was gonna buy 2s last week... mikekrane 11/14/17 07:57:36 PM
#629   I would say no. RainerRocks 11/14/17 07:32:55 PM
#628 CTS2016V 11/02/17 05:00:57 PM
#627   Interview with James Sapirstein, CEO of ContraVir Pharmaceuticals CTS2016V 10/30/17 02:12:05 AM
#626   Stick a fork in this one r/s will stockweiser 10/28/17 05:32:05 PM
#625   "After comprehensive review of the market opportunity for CTS2016V 10/27/17 08:24:16 PM
#624   Yep,this always happens with CTRV,after PR's it always RainerRocks 10/27/17 05:37:37 PM
#623   Getting dumped AH mikekrane 10/27/17 04:53:24 PM
#622   "Among new and sold out positions, 6 holders CTS2016V 10/27/17 11:57:38 AM
#621   Is CTRV worthless? Giovanni 10/25/17 02:22:08 PM
#620   Does anyone know when CTRV Giovanni 10/24/17 09:25:45 PM
#619   When will CTRV have to raise money? Giovanni 10/24/17 10:39:50 AM
#618   Presentations from AASLD: CTS2016V 10/23/17 05:55:19 PM
#617 CTS2016V 10/22/17 05:37:29 PM
#616   Wow! Amazing! Giovanni 10/22/17 03:39:34 PM
#615   A must see/listen : CTS2016V 10/22/17 03:02:02 PM
#614   Thank you Giovanni 10/20/17 09:52:38 AM
#613   Hey thanks for posting. That does sound like pennyfinder 10/19/17 11:40:55 PM
#612 mikekrane 10/19/17 09:32:57 PM
#611   Lol i was just giving you a hard mikekrane 10/19/17 09:25:50 PM
#610   LOL got your PM,it's not a scam,drug stocks RainerRocks 10/19/17 06:13:55 PM
#609   Item 8.01 RainerRocks 10/19/17 04:55:46 PM
#608   i posted it on stock twits roughly a mikekrane 10/19/17 02:44:54 PM
#607   Estimated Enrollment: 16 raja48185 10/19/17 11:29:48 AM
#606   Significant? Anybody know how many people in this trial? Giovanni 10/19/17 10:09:53 AM
#605   ContraVir Pharmaceuticals Initiated Dosing of Renally-Impaired Patients in Cbdpotential 10/19/17 09:00:14 AM
#604   Can you post that email here if you pennyfinder 10/18/17 09:29:29 PM
#603   Anyone know if Li Ka Shing Institute RainerRocks 10/17/17 01:48:35 PM
#602   So another PR to say they are collaborating RainerRocks 10/17/17 01:30:34 PM
#601   sold in pre TrendTrade2016 10/17/17 08:21:17 AM
#600   is this good news? or great news? Giovanni 10/17/17 08:20:02 AM
#599   CTRV news and gapper ...see ya at a dolla!! TrendTrade2016 10/17/17 06:15:27 AM
#598   What date is this phase 3 study finished? Giovanni 10/13/17 02:39:41 PM
#597   * * $CTRV Video Chart 10-12-17 * * ClayTrader 10/12/17 04:47:56 PM
#596   Shorts are currently at 4.75 % RainerRocks 10/12/17 01:30:20 PM
#595   Part 2 RainerRocks 10/12/17 01:18:55 PM
#594   Good news will hopefully become great news - raja48185 10/12/17 01:14:12 PM
#593   Now this is a good newswire, because it's RainerRocks 10/12/17 01:03:50 PM
#592   KLARA CZOBOR: Sure, great. And can you please RainerRocks 10/12/17 12:51:09 PM
#591   :) CTS2016V 10/12/17 12:31:54 PM
#590   CTRV runner TrendTrade2016 10/12/17 09:34:22 AM
#589   Interview with James Sapirstein, CEO at Contravir, on raja48185 10/11/17 12:02:41 AM
#588   Watch T G G I tomorrow. RainerRocks 10/08/17 11:44:25 PM
#587   Looks like you know something :) pennyfinder 10/08/17 08:50:23 PM
#586   Me loading :) mikekrane 10/07/17 12:52:30 PM
#585   What was the cause for that spike? Any idea? pennyfinder 10/06/17 09:48:52 PM