By the ZIVOLABS Medical Team · Updated April 2026 · 5 min read

Both Semasize and Semanat are DCGI-approved generic semaglutide injections, manufactured by two of India's established pharmaceutical companies. If you are starting GLP-1 treatment in India, one of these will almost certainly be what your doctor prescribes. Patients often ask which one is better. Here is the honest answer.

The short answer

They are clinically equivalent. Both contain the same active molecule — semaglutide — at the same approved doses. Both have demonstrated bioequivalence to the reference product (Ozempic) as required by DCGI approval. Neither is clinically superior to the other.

Your doctor will prescribe whichever is available through the dispensing pharmacy and supply chain at the time of your prescription. This is the appropriate approach — the same way a doctor prescribes atorvastatin and the pharmacy dispenses whichever DCGI-approved brand is in stock, without clinical consequence.

What both products share

About the manufacturers

Semasize — Alkem Laboratories

Alkem is one of India's top 10 pharmaceutical companies by domestic revenue, with manufacturing facilities approved by US FDA, WHO, and other international regulators. They manufacture a broad portfolio of branded and generic medications across therapeutic categories including cardiovascular, anti-infective, and metabolic. Alkem's scale and quality systems are well-established.

Semanat — Natco Pharma

Natco is a respected mid-size Indian pharmaceutical company with a particular reputation in complex generics and oncology. Natco has a history of producing generics of difficult-to-manufacture molecules, including biologics and specialty drugs. They have manufacturing facilities approved for export to regulated markets.

Both companies have track records in quality manufacturing. Neither is an unknown or unproven entity.

Is there any difference in the pen device?

The pre-filled pen format is functionally similar for both products — designed for self-injection by a non-medical user at the same approved subcutaneous injection sites (abdomen, upper thigh, upper arm). Minor differences in pen ergonomics or dose dial design may exist between the two products, but neither represents a clinical advantage.

If you receive one brand and are switched to the other due to supply availability, there is no adjustment period required and no dose change needed.

Why you might receive one over the other

Supply availability: Pharmaceutical supply chains in India fluctuate based on manufacturing output, distribution, and pharmacy stock levels. Your ZIVOLABS pharmacy will dispense whichever DCGI-approved product is available. This is standard practice and clinically appropriate.

Doctor preference: Some doctors develop familiarity with one product over another — not due to clinical superiority but simply through prescribing pattern. Both are acceptable.

Price at retail: If purchasing directly from a pharmacy rather than through ZIVOLABS, minor price differences may exist between the two products at different outlets.

Should you ask for a specific brand?

There is no clinical reason to. Both products deliver semaglutide at the prescribed dose. Both are DCGI-approved. Both come from manufacturers with established quality systems.

If you have been on one brand for several months and are comfortable with its pen format, continuity with the same brand is reasonable to request — but not medically necessary. If supply requires a switch, your clinical outcomes will not change.

Frequently asked questions

I started on Semasize and my pharmacy now only has Semanat. Should I be concerned? No. Both are semaglutide at the same dose. You can switch between them without any dose adjustment, re-titration, or clinical concern.

Are there any known quality issues with either product? As of 2026, there are no known DCGI-issued quality alerts for either Semasize or Semanat. If you have concerns about a specific batch, check the CDSCO recall and alert database at cdsco.gov.in.

My friend is on Semasize and losing weight faster than me on Semanat. Is that why? No. Individual weight loss rates vary based on starting weight, dose, dietary habits, metabolic profile, and many other factors. The brand is not a variable. Two people on the same brand can have very different results.

Is one cheaper than the other? Retail pricing is similar. Through ZIVOLABS, pricing is consistent regardless of which DCGI-approved product is dispensed.

The bottom line

Semasize and Semanat are clinically equivalent DCGI-approved semaglutide products. The choice between them is a supply chain decision, not a clinical one. Both are manufactured by credible Indian pharmaceutical companies. Both deliver the same molecule at the same dose with the same expected clinical outcome.

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This article is for informational purposes only and does not constitute medical advice. Always consult a qualified doctor before starting any treatment.