For about three years I used the same anti-dandruff shampoo. First two months were great. Flakes gone, scalp felt clean, felt like I had finally solved the problem. Then slowly the flakes came back. I switched brands. Same thing happened. Worked for a bit, then did not. I went through this cycle so many times that I started thinking dandruff was just something I would deal with forever. It is not. I just did not understand what was actually happening. Here is the short version. Dandruff is caused by a yeast called Malassezia that lives on everyone’s scalp. It is always there. The problem starts when it overgrows, which happens because of excess oil, stress, pollution, humidity, or your immune response to it. When it overgrows, it irritates the scalp, speeds up skin cell shedding, and you get flakes. Anti-dandruff shampoos control this yeast. They do not eliminate it permanently. When you stop using the shampoo, or if you use the same one long enough, the yeast bounces back. Over time, strong medicated shampoos also mess with the scalp’s natural pH, which is slightly acidic. Most medicated shampoos are alkaline. Use them for months continuously and you weaken the scalp’s natural barrier, which ironically makes the problem worse when you stop. That is the cycle most people are stuck in.
What Actually Works
Nizoral 2% Ketoconazole Shampoo
This is the strongest thing available over the counter in India for active, visible dandruff. Ketoconazole is an antifungal that directly targets Malassezia with clinical evidence behind it. An older large-scale trial found that 80% of people using 1% ketoconazole twice a week saw significant dandruff reduction within four weeks. The 2% version, which Nizoral India carries, is more potent. The way to use it is not as your daily shampoo. Apply it twice a week for four to six weeks to clear the active flare, then drop to once every two weeks as maintenance. It is a treatment, not a daily wash. Leaving it on for five minutes before rinsing makes a noticeable difference compared to rinsing immediately.
Nizoral can dry out the hair shaft with regular overuse. If your hair feels rough and dry after a few weeks, that is the shampoo doing too much work on the hair rather than the scalp. Back off frequency and follow up with a conditioner on the hair lengths only.
Selsun is the other clinical-grade option and the one most people have not tried because it sits in pharmacies rather than supermarket shelves. Selenium sulphide works differently from ketoconazole, which is exactly why you want both in rotation. It reduces the rate at which scalp cells turn over, which directly slows down flake production. Clinical data puts Selsun at broadly comparable efficacy to ketoconazole for moderate to severe dandruff. In one clinical comparison, both treated dandruff significantly better than placebo, with ketoconazole showing slightly better results at day 8 but comparable outcomes over the full treatment period. Selsun had more reported side effects in some trials, mostly around scalp irritation and a characteristic smell. It is not for daily use.
Rotate between Nizoral and Selsun every four to six weeks and most cases of persistent dandruff respond well. This is the rotation strategy most dermatologists suggest when a single product has plateaued for a patient.
Vichy Dercos Anti-Dandruff Shampoo
This is the one worth buying if you want something between a clinical treatment and a daily shampoo. Vichy’s Dercos uses selenium disulphide at a lower concentration than Selsun, combined with salicylic acid which is a keratolytic that breaks down the dead skin cell buildup on the scalp. What makes Dercos different from Nizoral and Selsun is the texture and feel. It does not dry out the hair. People who have very dry scalp dandruff specifically, which is flakier and less oily, tend to respond better to Dercos than to the pharmacy-grade ketoconazole shampoos.
The price per ml is high but the results justify it for people with sensitive scalps who find Nizoral or Selsun too aggressive. Available on Nykaa and Amazon India. Both the dry and normal-to-oily variants are worth considering depending on your scalp type.
Almost nobody in India talks about this one and I think it is genuinely underrated. Ducray is a French dermatological brand and their Squanorm shampoo uses piroctone olamine as the active ingredient, which is an antifungal that is gentler on the scalp than ketoconazole while still being clinically effective against Malassezia. For people who have tried ketoconazole and found it irritating or too drying, this is the move. The dry dandruff variant has glycerin added which keeps the scalp hydrated rather than stripping it. There is also an oily dandruff variant with a slightly different formula. The brand’s own data claims dandruff continues to be controlled for up to two months after stopping the course, which I cannot independently verify but matches what some users report.
What to Pair With Your Shampoo on Non-Treatment Days
The biggest mistake people make is using the medicated shampoo every single wash. It strips the scalp too aggressively when used daily. On the days you are not using a treatment shampoo, use a mild sulphate-reduced shampoo that does not further disrupt the scalp. Cetaphil Gentle Cleansing Shampoo or a basic pH-balanced shampoo works well as the in-between wash. Thinking of it as a treatment day and a maintenance day, rather than one shampoo for everything, is what makes the rotation approach sustainable.
The Ones Not Worth Buying
Head and Shoulders is the most-used anti-dandruff shampoo in India and I am going to be direct: it is not a treatment, it is cosmetic management. The zinc pyrithione in it does have mild antifungal properties, but at the concentration used in mass-market variants, it suppresses flakes without treating the underlying yeast overgrowth. The moment you stop, flakes return quickly. Long-term daily use with a harsh detergent base also strips the scalp. It is not the worst product in the world but it is definitely not solving anything.
Clinic Plus and Sunsilk “anti-dandruff” variants are even further from treatment. The active ingredient load is so low they function almost entirely as perfumed coverage. There is nothing clinical happening.
Ketomac shampoo is available in India and contains ketoconazole, similar to Nizoral. I would not rank it below Nizoral on efficacy, but the formulation base is more drying and some people find it harsher. If Nizoral is unavailable in your pharmacy, Ketomac works, but be more careful about frequency.
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