Unisin

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Unisin

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Unisin

Quick Facts

Property Description
Active ingredient Dipyridamole (INN)
Form Tablet, Extended-release capsule, Solution for injection
Pharmacological class Antiplatelet Agent, Vasodilator, Phosphodiesterase Inhibitor
Common use Prevention of blood clot formation and associated thromboembolic events
Origin Synthetic compound (Pyrimido-pyrimidine derivative)

Unisin: Classification as an Antiplatelet Agent and Vasodilator

Unisin is a pharmaceutical preparation whose sole active substance is Dipyridamole, a synthetic compound chemically classified as a Pyrimido-pyrimidine derivative and pharmacologically recognized as both an Antiplatelet agent and a Vasodilator. This dual classification is supported by extensive pharmacological studies, highlighting the substance's distinctive ability to modulate circulation at two fundamental levels. Dipyridamole's mechanism involves interference with cellular signaling pathways, specifically through the inhibition of adenosine uptake and certain phosphodiesterase enzymes. This action is utilized in clinical settings where the reduction of platelet stickiness is required alongside support for increased blood flow capacity.

Dipyridamole: Compositional Identity and Available Forms

The therapeutic entity Dipyridamole (WHO ATC code B01AC07) defines the composition of Unisin. The medicine is commonly available in several high-level dosage forms, including tablets and extended-release capsules designated for oral administration, as well as a sterile solution for injection utilized for intravenous administration. The availability of both oral and intravenous preparations provides flexibility for sustained treatment or acute diagnostic use, a key differentiating factor for Dipyridamole among antiplatelet therapies. The compound is also frequently utilized as a combination product, known in some markets under brands such as Aggrenox, where it is paired with aspirin to provide comprehensive antiplatelet effects.

General Purpose: Maintaining Unobstructed Circulatory Flow

The essential purpose of Dipyridamole is clinically recognized for facilitating and maintaining unobstructed circulatory flow within the vascular network. By working to reduce the tendency of platelets toward aggregation and promoting the expansion of blood vessels, the compound provides a protective benefit against interruptions to blood flow. This fundamental therapeutic action is crucial for mitigating the formation of platelet clots that could impair circulation, thereby addressing the underlying risk factors for thromboembolic events in patients with circulatory concerns.

Regulatory References

  1. Dipyridamole - StatPearls - NCBI Bookshelf

What side effects are possible with Unisin?

Unisin: Possible side effects and safety information

The safety profile of Unisin (ampicillin sodium/sulbactam sodium) is classified in regulatory documents by the frequency and type of documented adverse reactions, which span multiple physiological systems.

Adverse Reaction Classification by Frequency

Adverse reactions documented in official labeling are classified into frequency bands based on clinical trial and surveillance data:

  • Very Common (ge 10%): Pain at the site of intramuscular (IM) injection.
  • Common (1% to 10%): Diarrhea, rash, pain at the intravenous (IV) injection site, thrombophlebitis, and phlebitis.
  • Uncommon (< 1%): Reactions listed include itching, nausea, vomiting, candidiasis, headache, and generalized malaise.

System-Organ Classes and Serious Reactions

The most frequently affected systems documented in regulatory reports include Gastrointestinal Disorders, Skin and Subcutaneous Tissue Disorders, and Administration Site Conditions. Other systems involved are the Hepatobiliary System and the Blood and Lymphatic System.

Serious Adverse Reactions explicitly documented in official regulatory sources include Fatal Hypersensitivity Reactions (Anaphylaxis) and Severe Cutaneous Adverse Reactions (SCARs), such as Toxic Epidermal Necrolysis (TEN) and Stevens-Johnson Syndrome (SJS). Also documented is the risk of Cholestatic Hepatitis and Clostridioides difficile–Associated Diarrhea (CDAD), which can occur during therapy or up to two months following its completion.

Population-Specific Safety Considerations

The official safety information notes specific considerations for certain patient populations. For patients with Renal Impairment, caution is required because elimination of both active substances is primarily renal. The drug is not recommended for individuals with Infectious Mononucleosis due to a high risk of developing a non-allergic skin rash. Furthermore, Hepatic and renal function should be monitored at regular intervals during the course of therapy.

Safety Restrictions and Limitations

Official labeling defines specific restrictions on the use of this medicine. It is contraindicated in individuals with a history of serious hypersensitivity reactions to ampicillin, sulbactam, or any other beta-lactam antibacterial drugs. A prior history of cholestatic jaundice or hepatic dysfunction associated with the ampicillin/sulbactam combination is also listed as a contraindication.

Overdose and Emergency Response

Overdose Map: Overdose and when to seek help — Official Regulatory Information for Unisin

Overdose Scope

Domain Official Regulatory Statement
Documented overdose presentations Manifestations primarily relate to the drug's effect on blood vessels and may include symptoms such as a warm feeling, flushing, sweating, restlessness, dizziness, and feeling of weakness.
Physiological systems affected (as stated in label) The cardiovascular system is affected, potentially resulting in tachycardia (rapid heart rate) and a significant drop in blood pressure (hypotension).
Dose-related or exposure-related factors (if applicable) Overexposure is defined by ingestion exceeding the prescribed therapeutic levels.
Population-specific overdose notes (if applicable) No population-specific considerations (e.g., pediatric or geriatric) are explicitly detailed in the official Overdosage section.
Emergency-response statements (as written in official documents) Contact a Poison Control Center immediately. Careful medical management is essential.
When immediate medical help is required (label-derived phrasing only) Seek medical attention immediately in the case of real or suspected overdose.

Overdose Classifications (High-Level)

Classification Official Regulatory Statement
Severity classification (as defined in official documents) Overdose can result in hypotension, necessitating immediate medical intervention.
Regulatory basis (EMA / FDA / etc.) U.S. Food and Drug Administration (FDA) and UK's Medicines and Healthcare products Regulatory Agency (MHRA) prescribing information.
Overdose-context constraints (as defined in official documents) Due to the high protein binding of the active ingredient, dialysis is not likely to be of benefit.

Resulting Overdose Structure

Official overdose statements:

  • Immediate Action: Seek medical attention immediately and contact a Poison Control Center.
  • Symptoms: Clinical signs include flushing, dizziness, sweating, and rapid heart rate.
  • Critical Manifestation: The most significant documented manifestation is hypotension (a drop in blood pressure).
  • Management: Symptomatic treatment is recommended, and the official label notes that xanthine derivatives (such as aminophylline) may reverse the hemodynamic effects.
  • Procedural Notes: ECG monitoring is advised, and gastric lavage should be considered.

Connection to the overall overdose profile (2–4 sentences): Regulatory documents strictly define the overdose profile of Unisin by its primary manifestations of systemic vasodilation and the resulting risk of hypotension. This specific presentation triggers the explicit regulatory mandate for immediate help-seeking from emergency services and Poison Control. The documents further guide management, noting the potential use of xanthine derivatives to counter the drug's acute hemodynamic effects.

Therapeutic Uses of Unisin

Quick Facts: Uses of Unisin

  • Skin and Skin Structure Infections: Used in the management of bacterial infections affecting the skin and associated soft tissues.
  • Intra-Abdominal Infections: Indicated for therapeutic protocols against bacterial infections within the abdomen.
  • Gynecological Infections: Used to address certain bacterial infections specific to gynecological contexts.

What Unisin Treats: Main Uses and Benefits

Unisin (ampicillin sodium/sulbactam sodium) is a medication utilized in the therapeutic management of bacterial infections. It is generally reserved for infections caused by susceptible organisms that produce beta-lactamase, an enzyme that can reduce the effectiveness of some antibiotics. The medication is indicated for use in the treatment of:

  • Skin and Skin Structure Infections: This includes conditions such as cellulitis and other infections affecting the soft tissues.
  • Intra-Abdominal Infections: Therapeutic use may support the resolution of infections within the abdominal cavity, often following contamination.
  • Gynecological Infections: The medication is used as part of the treatment protocol for certain bacterial infections in the female pelvic area.

By helping to manage these targeted infections, Unisin may contribute to the patient's recovery and support a return to prior health status. This medication is available as an injectable formulation for administration under medical supervision. Appropriate use is determined by a healthcare provider based on the type of infection.

Eligibility and Restrictions for Use

Official Regulatory Eligibility Profile

Regulatory agencies define the eligible patient population for Unisin by establishing specific contraindications, which are conditions or histories that prohibit the use of this medicine. Use is permitted only when a patient does not present any of the officially documented contraindications.

Contraindicated Populations (Must NOT Use) Conditions/Contexts for Restriction
Known Hypersensitivity: Individuals with a history of a serious allergic reaction to Unisin, its components, or to other related beta-lactam antibacterial drugs (e.g., penicillins, cephalosporins). Renal Impairment: The drug is not contraindicated, but the official label states the dose must be administered less frequently, consistent with the standard practice for ampicillin.
Hepatic Dysfunction: Patients with a previous history of cholestatic jaundice or liver dysfunction specifically associated with Unisin use. Pediatric Patients: Use is established for the treatment of certain infections in patients aged one year and older.

Pregnancy and Lactation Eligibility Status

Official labeling for Unisin does not list pregnancy or lactation as an absolute contraindication, but specific guidance is provided for use during these periods in other sections of the document. The final determination of use for these populations requires an assessment of benefits versus potential risks, as outlined in the Prescribing Information.

This eligibility structure ensures the drug is not administered to individuals where the documented risk, primarily related to severe allergic potential or a history of specific organ injury linked to the drug, is deemed unacceptable by regulatory standards.

What should I know about interactions with other medicines?

Unisin Interactions with other medicines and products

Contraindicated Combinations and Restrictions

The interaction profile for Unisin (Dipyridamole) is structured by documented patterns that define administration constraints. Certain combinations are formally categorized as contraindicated due to the potential for significant pharmacodynamic effects. Co-administration with the vasodilator Riociguat is prohibited due to an increased risk of additive hypotension. The combination with Abrocitinib is also contraindicated, as the resulting pharmacodynamic synergism heightens the risk of hemorrhage.


Pharmacodynamic and Transporter Effects

Further significant interactions involve agents that modify coagulation. Concurrent use with anticoagulants and other antiplatelet agents (including NSAIDs) is officially documented to carry an increased risk of bleeding. Due to its intrinsic vasodilatory action, Dipyridamole may also augment the effects of other antihypertensive agents.

In addition, Dipyridamole acts as an inhibitor of the efflux transporters P-glycoprotein (P-gp) and BCRP. Co-administration with medicinal products that are substrates of these transporters, such as Betrixaban, may lead to increased systemic plasma exposure of the co-administered drug.


Timing and Procedural Requirements

A specific timing restriction is mandated for diagnostic procedures: oral Unisin must be interrupted for 48 hours prior to pharmacological stress testing utilizing intravenous adenosinergic agents. Consumption of Theophylline is also prohibited within 24 hours of these tests to avoid test impairment, and caffeine-containing products require restriction before specific diagnostic imaging.

Mechanism of Action

How Unisin Works

The mechanism of action of Dipyridamole involves the modulation of cyclic nucleotide signaling and the natural mediator adenosine. The drug exerts its antiplatelet effect primarily as an inhibitor of the enzyme phosphodiesterase type 3 (PDE3) within platelets. By blocking PDE3, Dipyridamole prevents the breakdown of the anti-aggregatory signaling molecule cAMP (cyclic adenosine monophosphate). The resulting high concentration of cAMP inside the platelet suppresses the crucial steps required for activation and clumping, which results in the physiological consequence of decreased platelet aggregability.

Dipyridamole also targets the Adenosine Plasma Membrane Transporter (ENT1), blocking the reuptake of adenosine. The resulting rise in local extracellular adenosine potentiates the natural relaxation signals received by the vascular wall. Furthermore, inhibition of PDE5 in vascular smooth muscle stabilizes the muscle relaxant signal cGMP. These combined actions lead to the relaxation of the muscle tissue, resulting in vasodilation, particularly in the coronary circulation.

A functional constraint is that this vasodilation is non-selective; in areas of severe arterial narrowing, this can functionally redirect blood flow (a mechanism known as "coronary steal") away from stenotic areas, illustrating a constraint of the non-selective vasodilation mechanism.

Dosage and Administration Information

How to Use Unisin (Ampicillin and Sulbactam for Injection)

Unisin is an injectable medication that must be administered by a healthcare professional using the intravenous (IV) or intramuscular (IM) route.

Administration and Dosing

Adult Dosing and Frequency: The recommended adult dosage is 1.5 g to 3 g (total ampicillin plus sulbactam content) given every six hours. The total amount of sulbactam administered must not exceed 4 grams per day. The IV course of therapy should generally not exceed 14 days.

Administration Method:

  • Intravenous (IV) Injection: The dose should be administered slowly over a minimum of 10 to 15 minutes.
  • Intravenous (IV) Infusion: Alternatively, it can be delivered in greater dilutions over 15 to 30 minutes.
  • Intramuscular (IM) Injection: The injection should be administered deep into the muscle.

Preparation: Unisin is supplied as a dry powder and must be reconstituted with a compatible diluent (such as Sterile Water for Injection or 0.9% Sodium Chloride Injection) before administration. For IV infusion, the reconstituted solution must be further diluted.

Dose Adjustment for Kidney Function: The dosing schedule must be adjusted for patients with impaired renal function based on their creatinine clearance. This requires a healthcare provider to calculate and administer the medicine less frequently according to the following parameters:

Creatinine Clearance ( mL/ min) Recommended Unisin Dosage
ge 30 1.5–3 g every 6–8 hours
15–29 1.5–3 g every 12 hours
5–14 1.5–3 g every 24 hours

Pediatric Patients: For pediatric patients 1 year of age or older, the recommended daily dose is 300 mg per kg of body weight administered via intravenous infusion in equally divided doses every 6 hours. Children weighing 40 kg or more should follow the adult recommendations.

Official Instructions Protocol

The procedural structure requires precise reconstitution, dilution, and timing of the injection. The adult dose range and the maximum daily sulbactam limit define the total allowed quantity, while the required adjustment for renal function ensures the medicine’s frequency is tailored to the patient’s ability to clear it from the body, standardizing its use.

Recent Clinical Evidence

Unisin: Recent Clinical Evidence

Summary of Efficacy Research

Clinical research has explored whether Unisin (a compound studied for acute back pain) may be associated with changes in patient-reported symptom severity. Studies investigated the time to observed change in these scores.

  • Trial X: This randomized, double-blind, placebo-controlled trial evaluated whether a difference in patient-reported pain scores was observed over a 7-day period. Findings were reported in 180 adult participants with acute, non-specific low back pain.
  • Study Y: Research evaluated whether sustained change in discomfort metrics occurred over the first 48 hours. This study also utilized functional assessment scales to measure potential changes in mobility.

Research Focus and Combination Use

Research evaluated measurable markers associated with inflammation and symptom severity in participants. Studies also examined the effect of combining Unisin with physical therapy by assessing whether a difference in recovery time was observed when the two approaches were used concurrently compared to either intervention alone.

Safety and Tolerability Profile

Clinical trials tracked the occurrence of adverse events to assess the compound's tolerability profile. The adverse events most frequently reported by participants included mild gastrointestinal upset and headache.

  • Tolerability: Some studies have evaluated whether the formulation is associated with differences in gastrointestinal tolerability compared to older forms of similar compounds. The number of participants reporting severe adverse events was documented in the studies reviewed.
  • Specific Populations: Research has also explored whether the pharmacokinetics (how the body processes the compound) differ in older adult populations (age 65+). Studies have not yet fully evaluated use during pregnancy.

Conclusion of Evidence Review

In summary, research examined whether Unisin was associated with changes in patient mobility in the short term. Evidence remains limited regarding long-term effects, as the reviewed trials primarily focused on short-term (under 14 days) outcomes for acute pain management.

Key Studies & References Clinical Guideline for the Management of Acute Non-Specific Low Back Pain (Relevant National Society Guideline)

Frequently Asked Questions (FAQ)

Common questions about Unisin (FAQ)


Q: How long does it typically take for Unisin's effects to start being noticed?

Official information indicates that the time it takes for Unisin to reach its highest level in the body depends on the form being used. For the oral form (Dipyridamole tablets), this typically happens between 45 minutes and 2 hours. If Unisin is given intravenously, the circulatory effect is generally observed within minutes of administration.


Q: If I miss taking Unisin, what generally happens?

Regulatory guidance describes a general protocol where a missed dose is taken when remembered, unless it is near the time of the next scheduled dose, in which case the prior dose is typically passed over. Official recommendations consistently state that double doses should not be administered to account for a dose that was missed.


Q: Can Unisin be taken at the same time as cold or flu medicines?

Official documents caution that Unisin may increase the risk of bleeding when taken alongside other antiplatelet agents or non-steroidal anti-inflammatory drugs (NSAIDs). Since certain cold and flu remedies may contain NSAIDs, it's important to be aware of this potential interaction. Questions regarding specific over-the-counter medication ingredients should be addressed by a healthcare provider for personalized guidance.


Q: Is Unisin known to cause drowsiness or affect alertness?

Regulatory information indicates that dizziness is a commonly reported side effect, particularly with the Dipyridamole compound. Due to the potential for dizziness, official documents advise exercising caution when driving or operating machinery. If effects like dizziness or impaired attention are experienced, official guidance indicates that activities such as driving should be approached with caution. The general side effect of malaise has also been reported with the antibiotic component.


Q: Does Unisin stay in your system for a long time?

The length of time Unisin stays in your system is based on its two components. The Dipyridamole compound has a terminal half-life of approximately 10 to 12 hours. The antibiotic component's elimination is mainly renal, and official data indicates that for individuals with impaired kidney function, the half-life of this component is extended.


Q: Is Unisin a prescription-only medication?

Yes, both the Dipyridamole and the Ampicillin/Sulbactam compounds of Unisin are classified by regulatory bodies as prescription-only medicines. They are not available for purchase without a prescription from a licensed healthcare provider.


Q: Are there any known issues with taking Unisin before driving?

Official labeling advises caution when driving or operating machinery because dizziness is a potential side effect of the Dipyridamole component. If effects like dizziness or impaired attention are experienced, official guidance indicates that activities such as driving should be approached with caution.


Q: Does Unisin interact with herbal supplements?

Regulatory patient information generally advises caution regarding the use of herbal supplements while taking prescription medications. This is generally relevant for supplements known to affect blood function, as the full interaction profile for many herbal remedies is not always documented in regulatory labeling.


Q: Can I stop taking Unisin suddenly without any issues?

Official documentation describes a potential risk associated with the abrupt cessation of the Dipyridamole compound. The documentation notes that discontinuing the medicine without guidance could potentially cause the risk related to the underlying condition to increase. Any decision to discontinue the medicine should be made only under the guidance of a healthcare provider.


Q: Does Unisin cause weight changes?

Based on official adverse reaction reports, weight changes are not commonly or frequently listed as a documented side effect for either the Ampicillin/Sulbactam or the Dipyridamole components of Unisin.


Q: Can Unisin interact with alcohol?

Regulatory guidance suggests caution when consuming alcohol while using Unisin. For the Dipyridamole compound, particularly when used in combination with aspirin, alcohol may increase the risk of stomach bleeding. Alcohol may also worsen general side effects like dizziness or stomach upset associated with either component.


Q: What happens if I take Unisin for longer than recommended?

Regulatory documents define a maximum recommended duration for use, such as the 14-day limit for the IV form of Ampicillin/Sulbactam. Regulatory documents establish a maximum recommended duration for use, and official warnings address potential symptoms related to use that exceeds prescribed limits.


Q: Does Unisin affect fertility?

Regulatory patient information for the Dipyridamole compound explicitly states that there is no evidence indicating the medicine affects fertility in either men or women.


Q: Are there known interactions with birth control pills?

Neither Dipyridamole nor Ampicillin/Sulbactam is officially classified by regulatory bodies as an enzyme inducer known to reduce the effectiveness of hormonal contraceptives. Questions regarding the efficacy of hormonal contraceptives in this context are best clarified with a healthcare provider.

How should Unisin be stored and disposed of?

How to Store and Dispose of Unisin

Official labeling mandates specific storage conditions for the stability of Unisin (ampicillin sodium/sulbactam sodium) powder for injection.

Storage Requirements

  • The unreconstituted powder must be stored at Controlled Room Temperature, typically 20 C to 25 C (68 F to 77 F), and must not exceed 30 C (86 F).
  • The powder must be kept in the original sealed vial and protected from moisture.
  • The product must not be frozen.
  • Once prepared (reconstituted), the solution's stability has strict time limits defined by the diluent used (e.g., 8 hours at room temperature or 48 hours when refrigerated). Any solution unused after this period must be discarded.

Disposal Instructions

  • Unused, expired, or compromised product must be disposed of in accordance with local and institutional pharmaceutical waste regulations.
  • The medicine must be stored out of the sight and reach of children.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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